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At suv.me we aim to inform, educate and entertainment car owners and future drivers about cars. We aim to simplify these complex machines into easier to understand components, especially when troubleshooting any issues that could popup over time – check engine light.
When most people see the check engine light comes fear and dread is the first emotions to come up, but often times the issue can be cheaper and easier to fix than one may first fear. That’s why we took the time to put together a big reference manual of the most common OBD-2 computer codes you may encounter.
What is your car’s On-board Diagnostics (OBD) system?
On-board Diagnostics (OBD) is a vehicle’s self-diagnostic and reporting capability that provides automotive technicians and vehicle owners with insights into the car’s various systems’ status and health. Introduced in the 1980s, OBD systems have evolved significantly over the years, with the current iteration, OBD-II, becoming a standard in vehicles manufactured from 1996 onwards in the United States.
This system monitors parts of the engine and other important vehicle components to ensure they are operating correctly and within emission limits. When a fault is detected, OBD records it as a diagnostic trouble code (DTC) and alerts the driver through a warning light on the dashboard, such as the Check Engine Light. This facilitates troubleshooting by providing a starting point for repairs and maintenance, making it an essential tool in automotive diagnostics and repair.
Research below any OBD-2 code you may get on your car…
1. Fuel and Air Metering codes
OBD-11 Fuel and Air Metering errors refer to issues detected by a vehicle’s onboard diagnostics system (OBD11) related to the measurement and regulation of fuel and air entering the engine. These errors can arise from malfunctions in components such as the mass airflow sensor, oxygen sensors, fuel injectors, and pressure regulators.
Symptoms may include poor engine performance, increased emissions, and reduced fuel efficiency. Diagnosing these errors typically requires reading the vehicle’s diagnostic trouble codes (DTCs) with an OBD-2 scanner, which can indicate specific faults within the fuel and air metering system, guiding technicians to the underlying problem for repair.
P0100 – Mass or Volume Air Flow Circuit Malfunction
P0101 – Mass or Volume Air Flow Circuit Range/Performance Problem
P0102 – Mass or Volume Air Flow Circuit Low Input
P0103 – Mass or Volume Air Flow Circuit High Input
P0104 – Mass or Volume Air Flow Circuit Intermittent
P0105 – Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
P0106 – Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0107 – Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0108 – Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0109 – Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
P0109 – Intake Air Temperature Circuit Malfunction
P0111 – Intake Air Temperature Circuit Range/Performance Problem
P0112 – Intake Air Temperature Circuit Low Input
2. OBD-II’s Generic Diagnostic Trouble Codes (DTCs)
Diagnostic Trouble Codes (DTCs) are standardized error messages output by a vehicle’s On-Board Diagnostics II (OBD2) system when it detects a malfunction or irregularity in the vehicle’s operations. These codes help identify specific issues within the vehicle’s engine, transmission, exhaust system, and other components.
Generic DTCs, which start with a “P0” or “U0” prefix, are universal across most makes and models, facilitating easier diagnosis and repair. They enable mechanics and vehicle owners to quickly ascertain the nature of a problem, ranging from emissions and sensor failures to engine misfires and fuel system issues, streamlining the troubleshooting process.
P0113 – Intake Air Temperature Circuit High Input
P0114 – Intake Air Temperature Circuit Intermittent
P0115 – Engine Coolant Temperature Circuit Malfunction
P0116 – Engine Coolant Temperature Circuit Range/Performance Problem
P0117 – Engine Coolant Temperature Circuit Low Input
P0118 – Engine Coolant Temperature Circuit High Input
P0119 – Engine Coolant Temperature Circuit Intermittent
P0120 – Throttle/Petal Position Sensor/Switch A Circuit Malfunction
P0121 – Throttle/Petal Position Sensor/Switch A Circuit Range/Performance Problem
P0122 – Throttle/Petal Position Sensor/Switch A Circuit Low Input
P0123 – Throttle/Petal Position Sensor/Switch A Circuit High Input
P0124 – Throttle/Petal Position Sensor/Switch A Circuit Intermittent
P0125 – Insufficient Coolant Temperature for Closed Loop Fuel Control
P0126 – Insufficient Coolant Temperature for Stable Operation
P0130 – Oxygen Sensor Circuit Malfunction (Bank I Sensor 1)
P0131 – Oxygen Sensor Circuit Low Voltage (Bank I Sensor I)
P0132 – Oxygen Sensor Circuit High Voltage (Bank I Sensor 1)
P0133 – Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0134 – Oxygen Sensor Circuit No Activity Detected (Bank I Sensor 1)
P0135 – Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0136 – Oxygen Sensor Circuit Malfunction (Bank I Sensor 2)
P0137 – Oxygen Sensor Circuit Low Voltage (Bank I Sensor 2)
P0138 – Oxygen Sensor Circuit High Voltage (Bank I Sensor 2)
P0139 – Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0140 – Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
P0141 – Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0142 – Oxygen Sensor Circuit Malfunction (Bank I Sensor 3)
P0143 – Oxygen Sensor Circuit Low Voltage (Bank I Sensor 3)
P0144 – Oxygen Sensor Circuit High Voltage (Bank I Sensor 3)
P0145 – Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 3)
P0146 – Oxygen Sensor Circuit No Activity Detected (Bank I Sensor 3)
P0147 – Oxygen Sensor Heater Circuit Malfunction (Bank I Sensor 3)
P0150 – Oxygen Sensor Circuit Malfunction (Bank 2 Sensor I)
P0151 – Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor I)
P0152 – Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 1)
P0153 – Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1)
P0154 – Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
P0155 – Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0156 – Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2)
P0157 – Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0158 – Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2)
P0159 – Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)
P0160 – Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
P0161 – Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
P0162 – Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 3)
P0163 – Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 3)
P0164 – Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 3)
P0165 – Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 3)
P0166 – Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 3)
P0167 – Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 3)
P0170 – Fuel Trim Malfunction (Bank 1)
P0171 – System too Lean (Bank 1)
P0172 – System too Rich (Bank 1)
P0173 – Fuel Trim Malfunction (Bank 2)
P0174 – System too Lean (Bank 2)
P0175 – System too Rich (Bank 2)
P0176 – Fuel Composition Sensor Circuit Malfunction
P0177 – Fuel Composition Sensor Circuit Range/Performance
P0178 – Fuel Composition Sensor Circuit Low Input
P0179 – Fuel Composition Sensor Circuit High Input
P0180 – Fuel Temperature Sensor A Circuit Malfunction
P0181 – Fuel Temperature Sensor A Circuit Range/Performance
P0182 – Fuel Temperature Sensor A Circuit Low Input
P0183 – Fuel Temperature Sensor A Circuit High Input
P0184 – Fuel Temperature Sensor A Circuit Intermittent
P0185 – Fuel Temperature Sensor B Circuit Malfunction
P0186 – Fuel Temperature Sensor B Circuit Range/Performance
P0187 – Fuel Temperature Sensor B Circuit Low Input
P0188 – Fuel Temperature Sensor B Circuit High Input
P0189 – Fuel Temperature Sensor B Circuit Intermittent
P0190 – Fuel Rail Pressure Sensor Circuit Malfunction
P0191 – Fuel Rail Pressure Sensor Circuit Range/Performance
P0192 – Fuel Rail Pressure Sensor Circuit Low Input
P0193 – Fuel Rail Pressure Sensor Circuit High Input
P0194 – Fuel Rail Pressure Sensor Circuit Intermittent
P0195 – Engine Oil Temperature Sensor Malfunction
P0196 – Engine Oil Temperature Sensor Range/Performance
P0197 – Engine Oil Temperature Sensor Low
P0198 – Engine Oil Temperature Sensor High
P0199 – Engine Oil Temperature Sensor Intermittent
3. Fuel and Air Metering (Injector Circuit) error codes
Fuel and Air Metering (Injector Circuit) error codes, output by the OBD-II system, specifically relate to issues within the fuel injection system, encompassing the injectors themselves and the circuits controlling them. These codes, typically starting with “P02” or “P03,” indicate problems such as injector circuit malfunctions, injector circuit open or short, and issues with the fuel injector’s performance or response.
Such errors can lead to symptoms like engine misfires, poor engine performance, reduced fuel efficiency, and increased emissions. Diagnosing these codes requires a detailed inspection of the injectors, wiring, and related components to identify and rectify faults, ensuring optimal engine operation.
P0200 – Injector Circuit Malfunction
P0201 – Injector Circuit Malfunction – Cylinder 1
P0202 – Injector Circuit Malfunction – Cylinder 2
P0203 – Injector Circuit Malfunction – Cylinder 3
P0204 – Injector Circuit Malfunction – Cylinder 4
P0205 – Injector Circuit Malfunction – Cylinder 5
P0206 – Injector Circuit Malfunction – Cylinder 6
P0207 – Injector Circuit Malfunction – Cylinder 7
P0208 – Injector Circuit Malfunction – Cylinder 8
P0209 – Injector Circuit Malfunction – Cylinder 9
P0210 – Injector Circuit Malfunction – Cylinder 10
P0211 – Injector Circuit Malfunction – Cylinder 11
P0212 – Injector Circuit Malfunction – Cylinder 12
P0213 – Cold Start Injector 1 Malfunction
P0214 – Cold Start Injector 2 Malfunction
P0215 – Engine Shutoff Solenoid Malfunction
P0216 – Injection Timing Control Circuit Malfunction
P0217 – Engine Overtemp Condition
P0218 – Transmission Over Temperature Condition
P0219 – Engine Overspeed Condition
P0220 – Throttle/Petal Position Sensor/Switch B Circuit Malfunction
P0221 – Throttle/Petal Position Sensor/Switch B Circuit Range/Performance Problem
P0222 – Throttle/Petal Position Sensor/Switch B Circuit Low Input
P0223 – Throttle/Petal Position Sensor/Switch B Circuit High Input
P0224 – Throttle/Petal Position Sensor/Switch B Circuit Intermittent
P0225 – Throttle/Petal Position Sensor/Switch C Circuit Malfunction
P0226 – Throttle/Petal Position Sensor/Switch C Circuit Range/Performance Problem
P0227 – Throttle/Petal Position Sensor/Switch C Circuit Low Input
P0228 – Throttle/Petal Position Sensor/Switch C Circuit High Input
P0229 – Throttle/Petal Position Sensor/Switch C Circuit Intermittent
P0230 – Fuel Pump Primary Circuit Malfunction
P0231 – Fuel Pump Secondary Circuit Low
P0232 – Fuel Pump Secondary Circuit High
P0233 – Fuel Pump Secondary Circuit Intermittent
P0234 – Engine Overboost Condition
P0235 – Turbocharger Boost Sensor A Circuit Malfunction
P0236 – Turbocharger Boost Sensor A Circuit Range/Performance
P0237 – Turbocharger Boost Sensor A Circuit Low
P0238 – Turbocharger Boost Sensor A Circuit High
P0239 – Turbocharger Boost Sensor B Malfunction
P0240 – Turbocharger Boost Sensor B Circuit Range/Performance
P0241 – Turbocharger Boost Sensor B Circuit Low
P0242 – Turbocharger Boost Sensor B Circuit High
P0243 – Turbocharger Wastegate Solenoid A Malfunction
P0244 – Turbocharger Wastegate Solenoid A Range/Performance
P0245 – Turbocharger Wastegate Solenoid A Low
P0246 – Turbocharger Wastegate Solenoid A High
P0247 – Turbocharger Wastegate Solenoid B Malfunction
P0248 – Turbocharger Wastegate Solenoid B Range/Performance
P0249 – Turbocharger Wastegate Solenoid B Low
P0250 – Turbocharger Wastegate Solenoid B High
P0251 – Injection Pump Fuel Metering Control “A” Malfunction (Cam/Rotor/Injector)
P0252 – Injection Pump Fuel Metering Control “A” Range/Performance (Cam/Rotor/Injector)
P0253 – Injection Pump Fuel Metering Control “A” Low (Cam/Rotor/Injector)
P0254 – Injection Pump Fuel Metering Control “A” High (Cam/Rotor/Injector)
P0255 – Injection Pump Fuel Metering Control “A” Intermittent (Cam/Rotor/Injector)
P0256 – Injection Pump Fuel Metering Control “B” Malfunction (Cam/Rotor/Injector)
P0257 – Injection Pump Fuel Metering Control “B” Range/Performance Injector)
P0258 – Injection Pump Fuel Metering Control “B” Low (Cam/R
P0259 – Injection Pump Fuel Metering Control “B” High (Cam/R
P0260 – Injection Pump Fuel Metering Control “B” Intermittent Injector)
P0261 – Cylinder I Injector Circuit Low
P0262 – Cylinder I Injector Circuit High
P0263 – Cylinder I Contribution/Balance Fault
P0264 – Cylinder 2 Injector Circuit Low
P0265 – Cylinder 2 Injector Circuit High
P0266 – Cylinder 2 Contribution/Balance Fault
P0267 – Cylinder 3 Injector Circuit Low
P0268 – Cylinder 3 Injector Circuit High
P0269 – Cylinder 3 Contribution/Balance Fault
P0270 – Cylinder 4 Injector Circuit Low
P0271 – Cylinder 4 Injector Circuit High
P0272 – Cylinder 4 Contribution/Balance Fault
P0273 – Cylinder 5 Injector Circuit Low
P0274 – Cylinder 5 Injector Circuit High
P0275 – Cylinder S Contribution/Balance Fault
P0276 – Cylinder 6 Injector Circuit Low
P0277 – Cylinder 6 Injector Circuit High
P0278 – Cylinder 6 Contribution/Balance Fault
P0279 – Cylinder 7 Injector Circuit Low
P0280 – Cylinder 7 Injector Circuit High
P0281 – Cylinder 7 Contribution/Balance Fault
P0282 – Cylinder 8 Injector Circuit Low
P0283 – Cylinder 8 Injector Circuit High
P0284 – Cylinder 8 Contribution/Balance Fault
P0285 – Cylinder 9 Injector Circuit Low
P0286 – Cylinder 9 Injector Circuit High
P0287 – Cylinder 9 Contribution/Balance Fault
P0288 – Cylinder 10 Injector Circuit Low
P0289 – Cylinder 10 Injector Circuit High
P0290 – Cylinder 10 Contribution/Balance Fault
P0291 – Cylinder 11 Injector Circuit Low
P0292 – Cylinder 11 Injector Circuit High
P0293 – Cylinder 11 Contribution/Balance Fault
P0294 – Cylinder 12 Injector Circuit Low
P0295 – Cylinder 12 Injector Circuit High
P0296 – Cylinder 12 Contribution/Range Fault
4. OBD-2’s Ignition System or Misfire codes
Ignition System or Misfire error codes, identified by the OBD 2 system, signal issues with the vehicle’s ignition process or instances of engine misfires. These codes, generally prefixed with “P03,” pinpoint problems such as faulty spark plugs, defective ignition coils, improper engine timing, or issues within the fuel system that prevent the engine from burning fuel efficiently.
Misfires can lead to engine hesitation, reduced power, increased fuel consumption, and excessive emissions. Quickly addressing these errors is crucial for maintaining engine health and performance. Diagnosing them involves examining the ignition components, checking for fuel delivery problems, and ensuring the engine’s timing is correctly set.
P0300 – Random/Multiple Cylinder Misfire Detected
P0301 – Cylinder 1 Misfire Detected
P0302 – Cylinder 2 Misfire Detected
P0303 – Cylinder 3 Misfire Detected
P0304 – Cylinder 4 Misfire Detected
P0305 – Cylinder 5 Misfire Detected
P0306 – Cylinder 6 Misfire Detected
P0307 – Cylinder 7 Misfire Detected
P0308 – Cylinder 8 Misfire Detected
P0309 – Cylinder 9 Misfire Detected
P0311 – Cylinder 11 Misfire Detected
P0312 – Cylinder 12 Misfire Detected
P0320 – Ignition/Distributor Engine Speed Input Circuit Malfunction
P0321 – Ignition/Distributor Engine Speed Input Circuit Range/Performance
P0322 – Ignition/Distributor Engine Speed Input Circuit No Signal
P0323 – Ignition/Distributor Engine Speed Input Circuit Intermittent
P0325 – Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor)
P0326 – Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
P0327 – Knock Sensor 1 Circuit Low Input (Bank I or Single Sensor)
P0328 – Knock Sensor 1 Circuit High Input (Bank I or Single Sensor)
P0329 – Knock Sensor 1 Circuit Intermittent (Bank 1 or Single Sensor)
P0330 – Knock Sensor 2 Circuit Malfunction (Bank 2)
P0331 – Knock Sensor 2 Circuit Range/Performance (Bank 2)
P0332 – Knock Sensor 2 Circuit Low Input (Bank 2)
P0333 – Knock Sensor 2 Circuit High Input (Bank 2)
P0334 – Knock Sensor 2 Circuit Intermittent (Bank 2)
P0335 – Crankshaft Position Sensor A Circuit Malfunction
P0336 – Crankshaft Position Sensor A Circuit Range/Performance
P0337 – Crankshaft Position Sensor A Circuit Low Input
P0338 – Crankshaft Position Sensor A Circuit High Input
P0339 – Crankshaft Position Sensor A Circuit Intermittent
P0340 – Camshaft Position Sensor Circuit Malfunction
P0341 – Camshaft Position Sensor Circuit Range/Performance
P0342 – Camshaft Position Sensor Circuit Low Input
P0343 – Camshaft Position Sensor Circuit High Input
P0344 – Camshaft Position Sensor Circuit Intermittent
P0350 – Ignition Coil Primary/Secondary Circuit Malfunction
P0351 – Ignition Coil A Primary/Secondary Circuit Malfunction
P0352 – Ignition Coil B Primary/Secondary Circuit Malfunction
P0353 – Ignition Coil C Primary/Secondary Circuit Malfunction
P0354 – Ignition Coil D Primary/Secondary Circuit Malfunction
P0355 – Ignition Coil E Primary/Secondary Circuit Malfunction
P0356 – Ignition Coil F Primary/Secondary Circuit Malfunction
P0357 – Ignition Coil G Primary/Secondary Circuit Malfunction
P0358 – Ignition Coil H Primary/Secondary Circuit Malfunction
P0359 – Ignition Coil I Primary/Secondary Circuit Malfunction
P0360 – Ignition Coil J Primary/Secondary Circuit Malfunction
P0361 – Ignition Coil K Primary/Secondary Circuit Malfunction
P0362 – Ignition Coil L Primary/Secondary Circuit Malfunction
P0370 – Timing Reference High Resolution Signal A Malfunction
P0371 – Timing Reference High Resolution Signal A Too Many Pulses
P0372 – Timing Reference High Resolution Signal A Too Few Pulses
P0373 – Timing Reference High Resolution Signal A Intermittent/Erratic Pulses
P0374 – Timing Reference High Resolution Signal A No Pulses
P0375 – Timing Reference High Resolution Signal B Malfunction
P0376 – Timing Reference High Resolution Signal B Too Many Pulses
P0377 – Timing Reference High Resolution Signal B Too Few Pulses
P0378 – Timing Reference High Resolution Signal B Intermittent/Erratic Pulses
P0379 – Timing Reference High Resolution Signal B No Pulses
P0380 – Glow Plug/Heater Circuit “A” Malfunction
P0381 – Glow Plug/Heater Indicator Circuit Malfunction
P0382 – Exhaust Gas Recirculation Flow Malfunction
P0385 – Crankshaft Position Sensor B Circuit Malfunction
P0386 – Crankshaft Position Sensor B Circuit Range/Performance
P0387 – Crankshaft Position Sensor B Circuit Low Input
P0388 – Crankshaft Position Sensor B Circuit High Input
P0389 – Crankshaft Position Sensor B Circuit Intermittent
5. OBD II’s Auxiliary Emissions Controls codes
Auxiliary Emissions Controls error codes, output by the OBD11 system, are associated with components that aid in reducing a vehicle’s emissions but are not directly involved in the primary combustion process. These codes, often starting with “P04,” cover issues with parts like the Exhaust Gas Recirculation (EGR) system, Evaporative Emission Control System (EVAP), and Secondary Air Injection system.
Faults may include leaks, blockages, or failures in these systems’ valves, sensors, and pumps, leading to increased emissions and potential performance problems. Diagnosing these codes is essential for ensuring that a vehicle meets emission standards and operates efficiently, requiring a thorough inspection of the auxiliary emissions control components.
P0400 – Exhaust Gas Recirculation Flow Malfunction
P0401 – Exhaust Gas Recirculation Flow Insufficient Detected
P0402 – Exhaust Gas Recirculation Flow Excessive Detected
P0403 – Exhaust Gas Recirculation Circuit Malfunction
P0404 – Exhaust Gas Recirculation Circuit Range/Performance
P0405 – Exhaust Gas Recirculation Sensor A Circuit Low
P0406 – Exhaust Gas Recirculation Sensor A Circuit High
P0407 – Exhaust Gas Recirculation Sensor B Circuit Low
P0408 – Exhaust Gas Recirculation Sensor B Circuit High
P0410 – Secondary Air Injection System Malfunction
P0411 – Secondary Air Injection System Incorrect Flow Detected
P0412 – Secondary Air Injection System Switching Valve A Circuit Malfunction
P0413 – Secondary Air Injection System Switching Valve A Circuit Open
P0414 – Secondary Air Injection System Switching Valve A Circuit Shorted
P0415 – Secondary Air Injection System Switching Valve B Circuit Malfunction
P0416 – Secondary Air Injection System Switching Valve B Circuit Open
P0417 – Secondary Air Injection System Switching Valve B Circuit Shorted
P0418 – Secondary Air Injection System Relay ‘A” Circuit Malfunction
P0419 – Secondary Air Injection System Relay “B’ Circuit Malfunction
P0420 – Catalyst System Efficiency Below Threshold (Bank 1)
P0421 – Warm Up Catalyst Efficiency Below Threshold (Bank 1)
P0422 – Main Catalyst Efficiency Below Threshold (Bank 1)
P0423 – Heated Catalyst Efficiency Below Threshold (Bank 1)
P0424 – Heated Catalyst Temperature Below Threshold (Bank 1)
P0430 – Catalyst System Efficiency Below Threshold (Bank 2)
P0431 – Warm Up Catalyst Efficiency Below Threshold (Bank 2)
P0432 – Main Catalyst Efficiency Below Threshold (Bank 2)
P0433 – Heated Catalyst Efficiency Below Threshold (Bank 2)
P0434 – Heated Catalyst Temperature Below Threshold (Bank 2)
P0440 – Evaporative Emission Control System Malfunction
P0441 – Evaporative Emission Control System Incorrect Purge Flow
P0442 – Evaporative Emission Control System Leak Detected (small leak)
P0443 – Evaporative Emission Control System Purge Control Valve Circuit
P0444 – Evaporative Emission Control System Purge Control Valve Circuit
P0445 – Evaporative Emission Control System Purge Control Valve Circuit Shorted
P0446 – Evaporative Emission Control System Vent Control Circuit Malfunction
P0447 – Evaporative Emission Control System Vent Control Circuit Open
P0448 – Evaporative Emission Control System Vent Control Circuit Shorted
P0449 – Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
P0450 – Evaporative Emission Control System Pressure Sensor Malfunction
P0451 – Evaporative Emission Control System Pressure Sensor Range/Performance
P0452 – Evaporative Emission Control System Pressure Sensor Low Input
P0453 – Evaporative Emission Control System Pressure Sensor High Input
P0454 – Evaporative Emission Control System Pressure Sensor Intermittent
P0455 – Evaporative Emission Control System Leak Detected (gross leak)
P0460 – Fuel Level Sensor Circuit Malfunction
P0461 – Fuel Level Sensor Circuit Range/Performance
P0462 – Fuel Level Sensor Circuit Low Input
P0463 – Fuel Level Sensor Circuit High Input
P0464 – Fuel Level Sensor Circuit Intermittent
P0465 – Purge Flow Sensor Circuit Malfunction
P0466 – Purge Flow Sensor Circuit Range/Performance
P0467 – Purge Flow Sensor Circuit Low Input
P0468 – Purge Flow Sensor Circuit High Input
P0469 – Purge Flow Sensor Circuit Intermittent
P0470 – Exhaust Pressure Sensor Malfunction
P0471 – Exhaust Pressure Sensor Range/Performance
P0472 – Exhaust Pressure Sensor Low
P0473 – Exhaust Pressure Sensor High
P0474 – Exhaust Pressure Sensor Intermittent
P0475 – Exhaust Pressure Control Valve Malfunction
P0476 – Exhaust Pressure Control Valve Range/Performance
P0477 – Exhaust Pressure Control Valve Low
P0478 – Exhaust Pressure Control Valve High
P0479 – Exhaust Pressure Control Valve Intermittent
P0480 – Cooling Fan I Control Circuit Malfunction
P0481 – Cooling Fan 2 Control Circuit Malfunction
P0482 – Cooling Fan 3 Control Circuit Malfunction
P0483 – Cooling Fan Rationality Check Malfunction
P0484 – Cooling Fan Circuit Over Current
P0485 – Cooling Fan Power/Ground Circuit Malfunction
6. Vehicle Speed Controls and Idle Control System OBD-II error codes explained
Vehicle Speed Controls and Idle Control System OBD II error codes pertain to issues affecting the management of a vehicle’s speed and its idle performance. These codes, often starting with “P05,” address malfunctions in systems like the cruise control, throttle position sensor, idle air control valve, and related electronic circuits.
Problems can manifest as erratic idle speed, difficulty in maintaining consistent vehicle speed, or failures in the cruise control system. Identifying and rectifying these errors involves inspecting and testing the implicated components to ensure they correctly regulate the engine’s idle and respond to speed control inputs, crucial for safe driving and optimal engine performance.
P0500 – Vehicle Speed Sensor Malfunction
P0501 – Vehicle Speed Sensor Range/Performance
P0502 – Vehicle Speed Sensor Low Input
P0503 – Vehicle Speed Sensor Intermittent/Erratic/High
P0505 – Idle Control System Malfunction
P0506 – Idle Control System RPM Lower Than Expected
P0507 – Idle Control System RPM Higher Than Expected
P0510 – Closed Throttle Position Switch Malfunction
P0520 – Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0521 – Engine Oil Pressure Sensor/Switch Circuit Range/Performance
P0522 – Engine Oil Pressure Sensor/Switch Circuit Low Voltage
P0523 – Engine Oil Pressure Sensor/Switch Circuit High Voltage
P0530 – A/C Refrigerant Pressure Sensor Circuit Malfunction
P0531 – A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0532 – A/C Refrigerant Pressure Sensor Circuit Low Input
P0533 – A/C Refrigerant Pressure Sensor Circuit High Input
P0534 – Air Conditioner Refrigerant Charge Loss
P0550 – Power Steering Pressure Sensor Circuit Malfunction
P0551 – Power Steering Pressure Sensor Circuit Range/Performance
P0552 – Power Steering Pressure Sensor Circuit Low Input
P0553 – Power Steering Pressure Sensor Circuit High Input
P0554 – Power Steering Pressure Sensor Circuit Intermittent
P0560 – System Voltage Malfunction
P0561 – System Voltage Unstable
P0562 – System Voltage Low
P0563 – System Voltage High
P0565 – Cruise Control On Signal Malfunction
P0566 – Cruise Control Off Signal Malfunction
P0567 – Cruise Control Resume Signal Malfunction
P0568 – Cruise Control Set Signal Malfunction
P0569 – Cruise Control Coast Signal Malfunction
P0570 – Cruise Control Accel Signal Malfunction
P0571 – Cruise Control/Brake Switch A Circuit Malfunction
P0572 – Cruise Control/Brake Switch A Circuit Low
P0573 – Cruise Control/Brake Switch A Circuit High
P0574 – Cruise Control Related Malfunction
P0575 – Cruise Control Related Malfunction
P0576 – Cruise Control Related Malfunction
P0576 – Cruise Control Related Malfunction
P0578 – Cruise Control Related Malfunction
P0579 – Cruise Control Related Malfunction
P0580 – Cruise Control Related Malfunction
7. OBD-II’s Computer Output Circuit error codes
Computer Output Circuit OBD-II error codes identify issues within the vehicle’s onboard computer system, particularly focusing on the output signals that control various actuators and systems. These codes, usually starting with “P06,” signal faults in the circuits or pathways through which the Engine Control Unit (ECU) communicates with components such as solenoids, relays, and motors. Problems could manifest as failures in executing commands like adjusting the air-fuel mixture, controlling the ignition timing, or operating emission control devices.
Diagnosing these codes requires checking the wiring, connectors, and the components controlled by the affected circuits, ensuring the vehicle’s computer can accurately manage its systems for optimal performance.
P0600 – Serial Communication Link Malfunction
P0601 – Internal Control Module Memory Check Sum Error
P0602 – Control Module Programming Error
P0603 – Internal Control Module Keep Alive Memory (KAM) Error
P0604 – Internal Control Module Random Access Memory (RAM) Error
P0605 – Internal Control Module Read Only Memory (ROM) Error
P0606 – PCM Processor Fault
P0608 – Control Module VSS Output “A’ Malfunction
P0609 – Control Module VSS Output “B” Malfunction
P0620 – Generator Control Circuit Malfunction
P0621 – Generator Lamp “L” Control Circuit Malfunction
P0622 – Generator Field “F” Control Circuit Malfunction
P0650 – Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
P0654 – Engine RPM Output Circuit Malfunction
P0655 – Engine Hot Lamp Output Control Circuit Malfunction
P0656 – Fuel Level Output Circuit Malfunction
8. The many OBD-II Transmission errors named!
The transmission OBD II error codes are crucial for diagnosing issues within a vehicle’s transmission system, encompassing both automatic and manual types. These codes, generally starting with “P07” for generic issues, highlight problems such as improper shifting, transmission slippage, fluid leaks, and malfunctioning sensors or solenoids that control transmission operations.
Symptoms might include erratic shifting, inability to engage gears, decreased fuel efficiency, or a noticeable delay in acceleration. Addressing these errors promptly is vital to avoid further damage and costly repairs, requiring a comprehensive evaluation of the transmission’s mechanical and electrical components to ensure smooth, efficient vehicle operation.
P0700 – Transmission Control System Malfunction
P0701 – Transmission Control System Range/Performance
P0702 – Transmission Control System Electrical
P0703 – Torque Converter/Brake Switch B Circuit Malfunction
P0704 – Clutch Switch Input Circuit Malfunction
P0705 – Transmission Range Sensor Circuit malfunction (PRNDL Input)
P0706 – Transmission Range Sensor Circuit Range/Performance
P0707 – Transmission Range Sensor Circuit Low Input
P0708 – Transmission Range Sensor Circuit High Input
P0709 – Transmission Range Sensor Circuit Intermittent
P0710 – Transmission Fluid Temperature Sensor Circuit Malfunction
P0711 – Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712 – Transmission Fluid Temperature Sensor Circuit Low Input
P0713 – Transmission Fluid Temperature Sensor Circuit High Input
P0714 – Transmission Fluid Temperature Sensor Circuit Intermittent
P0715 – Input/Turbine Speed Sensor Circuit Malfunction
P0716 – Input/Turbine Speed Sensor Circuit Range/Performance
P0717 – Input/Turbine Speed Sensor Circuit No Signal
P0718 – Input/Turbine Speed Sensor Circuit Intermittent
P0719 – Torque Converter/Brake Switch B Circuit Low
P0720 – Output Speed Sensor Circuit Malfunction
P0721 – Output Speed Sensor Range/Performance
P0722 – Output Speed Sensor No Signal
P0723 – Output Speed Sensor Intermittent
P0724 – Torque Converter/Brake Switch B Circuit High
P0725 – Engine Speed input Circuit Malfunction
P0726 – Engine Speed Input Circuit Range/Performance
P0727 – Engine Speed Input Circuit No Signal
P0728 – Engine Speed Input Circuit Intermittent
P0730 – Incorrect Gear Ratio
P0731 – Gear I Incorrect ratio
P0732 – Gear 2 Incorrect ratio
P0733 – Gear 3 Incorrect ratio
P0734 – Gear 4 Incorrect ratio
P0735 – Gear 5 Incorrect ratio
P0736 – Reverse incorrect gear ratio
P0740 – Torque Converter Clutch Circuit Malfunction
P0741 – Torque Converter Clutch Circuit Performance or Stuck Off
P0742 – Torque Converter Clutch Circuit Stock On
P0743 – Torque Converter Clutch Circuit Electrical
P0744 – Torque Converter Clutch Circuit Intermittent
P0745 – Pressure Control Solenoid Malfunction
P0746 – Pressure Control Solenoid Performance or Stuck Off
P0747 – Pressure Control Solenoid Stuck On
P0748 – Pressure Control Solenoid Electrical
P0749 – Pressure Control Solenoid Intermittent
P0750 – Shift Solenoid A Malfunction
P0751 – Shift Solenoid A Performance or Stuck Off
P0752 – Shift Solenoid A Stuck On
P0753 – Shift Solenoid A Electrical
P0754 – Shift Solenoid A Intermittent
P0755 – Shift Solenoid B Malfunction
P0756 – Shift Solenoid B Performance or Stock Off
P0757 – Shift Solenoid B Stuck On
P0758 – Shift Solenoid B Electrical
P0759 – Shift Solenoid B Intermittent
P0760 – Shift Solenoid C Malfunction
P0761 – Shift Solenoid C Performance or Stuck Off
P0762 – Shift Solenoid C Stuck On
P0763 – Shift Solenoid C Electrical
P0764 – Shift Solenoid C Intermittent
P0765 – Shift Solenoid D Malfunction
P0766 – Shift Solenoid D Performance or Stuck Off
P0767 – Shift Solenoid D Stuck On
P0768 – Shift Solenoid D Electrical
P0769 – Shift Solenoid D Intermittent
P0770 – Shift Solenoid E Malfunction
P0771 – Shift Solenoid E Performance or Stuck Off
P0772 – Shift Solenoid E Stuck On
P0773 – Shift Solenoid E Electrical
P0774 – Shift Solenoid E Intermittent
P0780 – Shift Malfunction
P0781 – 1-2 Shift Malfunction
P0782 – 2-3 Shift Malfunction
P0783 – 3-4 Shift Malfunction
P0784 – 4-5 Shift Malfunction
P0785 – Shift/Timing Solenoid Malfunction
P0786 – Shift/Timing Solenoid Range/Performance
P0787 – Shift/Timing Solenoid Low
P0788 – Shift/Timing Solenoid High
P0789 – Shift/Timing Solenoid Intermittent
P0790 – Normal/Performance Switch Circuit Malfunction
P0801 – Reverse Inhibit Control Circuit Malfunction
P0803 – 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction
P0804 – 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction
Conclusion
If you ever have to get a OBD reading on your car – which can cost as high a $90 – just know, you don’t have to repair right away. Just write down the error code, consult our thorough reference for the correct number and quick description for your starting point of research.
Then, just google the cost to repair the particular code and how serious it maybe. Some codes could mean there is immediate danger to your car and it’s components and others not as dire – that’s up to you and your mechanic.
