Understanding your car’s health is becoming increasingly reliant on its onboard diagnostic system. OBD2 (On-Board Diagnostics II) is the standard system used in most modern vehicles to monitor various components and systems, alerting you to potential issues through diagnostic trouble codes (DTCs). Whether you’re a seasoned mechanic or a car owner keen on understanding your vehicle better, deciphering OBD2 codes is a valuable skill. This guide will break down the structure of these codes and provide a comprehensive overview of common generic fault codes, empowering you to take a proactive approach to vehicle maintenance and repair.
Understanding the Structure of OBD2 DTCs
OBD2 fault codes are designed to be universally understood, regardless of vehicle manufacturer. This standardization allows any compatible diagnostic tool to read and interpret these codes, providing a consistent approach to vehicle diagnostics. Each DTC follows a specific format, composed of five characters, which reveals key information about the nature and location of the problem.
The first character of an OBD2 code is always a letter, indicating the primary system affected:
- P (Powertrain): This signifies issues related to the engine, transmission, and associated components – the core systems that propel the vehicle. Powertrain codes are the most common and cover a wide range of potential problems.
- C (Chassis): Chassis codes point to problems with the vehicle’s structural and operational framework, including systems like braking, steering, and suspension.
- B (Body): Body codes relate to components within the car’s body, such as airbags, power windows, air conditioning, and central locking.
- U (User Network): U codes indicate communication issues within the vehicle’s computer network. These can be more complex problems involving the electronic communication between different control modules.
The second character is a digit that specifies whether the code is generic or manufacturer-specific:
- 0: Indicates a generic or standard OBD2 code. These codes are the same across all vehicle manufacturers, ensuring uniformity in basic diagnostics.
- 1: Indicates a manufacturer-specific code. While the OBD2 system provides a range of generic codes, manufacturers can add their own codes to provide more detailed diagnostics for their specific vehicle models.
The third character, a digit, for P (Powertrain) codes, further categorizes the sub-system involved. This is particularly helpful in narrowing down the area of concern within the complex powertrain system:
- P0, P1, P2: Relate to issues with the air/fuel mixture. These codes are crucial for diagnosing problems affecting engine efficiency and emissions.
- P3: Indicates problems within the ignition system. Issues here can range from spark plug malfunctions to problems with ignition coils.
- P4: Deals with auxiliary emission controls. These codes are important for diagnosing issues with systems designed to reduce vehicle emissions.
- P5: Concerns engine idling problems. These codes can help pinpoint issues causing rough idling or stalling.
- P6: Relates to the onboard computer and output systems. This category covers a wide array of electronic control and output functions.
- P7, P8, P9: Focus on the transmission (gearbox). These codes are essential for diagnosing automatic transmission issues.
- PA, PB, PC: Indicate problems related to hybrid propulsion systems. Relevant for hybrid vehicles, these codes address the unique aspects of their powertrain.
The last two characters, digits, represent an incremented number, often hexadecimal, providing a specific identifier for the fault within the sub-system category. The entire five-character code provides a precise description of the detected problem.
These standardized OBD2 codes are based on SAE J2012 and ISO 15031-6 standards, which encompass thousands of defined codes to cover a vast range of potential vehicle issues. Modern versions of these standards include approximately 11,000 definitions, reflecting the increasing complexity of vehicle systems.
Exploring Common OBD2 Fault Codes: P0000 – P0299 (Air/Fuel Mixture Control)
The following tables list a selection of common generic OBD2 codes, specifically focusing on the P0000 to P0299 range, which primarily deals with air/fuel mixture control. These codes are fundamental to understanding engine performance and fuel efficiency.
Standard Fault Codes (DTC) from P0000 to P0099
| Code | Description |
|---|---|
| P0000 | No trouble code |
| P0001 | Fuel Volume Regulator Control Circuit / Open |
| P0002 | Fuel Volume Regulator Control Circuit Range/Performance |
| P0003 | Fuel Volume Regulator Control Circuit Low |
| P0004 | Fuel Volume Regulator Control Circuit High |
| P0005 | Fuel Shutoff Valve Control Circuit / Open |
| P0006 | Fuel Shutoff Valve Control Circuit Low |
| P0007 | Fuel Shutoff Valve Control Circuit High |
| P0008 | Engine Position System Performance – Bank 2 |
| P0009 | Engine Position System Performance – Bank 2 |
| P0010 | Intake Camshaft Position Actuator Circuit / Open (Bank 2) |
| P0011 | Intake Camshaft Position Timing – Over-Advanced (Bank 2) |
| P0012 | Intake Camshaft Position Timing – Over-Retarded (Bank 2) |
| P0013 | Exhaust Camshaft Position Actuator Circuit / Open (Bank 2) |
| P0014 | Exhaust Camshaft Position Timing – Over-Advanced (Bank 2) |
| P0015 | Exhaust Camshaft Position Timing – Over-Retarded (Bank 2) |
| P0016 | Crankshaft Position Camshaft Position Correlation Bank 2 Sensor A |
| P0017 | Crankshaft Position Camshaft Position Correlation Bank 2 Sensor B |
| P0018 | Crankshaft Position Camshaft Position Correlation Bank 2 Sensor A |
| P0019 | Crankshaft Position Camshaft Position Correlation Bank 2 Sensor B |
| P0020 | Intake Camshaft Position Actuator Circuit / Open (Bank 2) |
| P0021 | Intake Camshaft Position Timing – Over-Advanced (Bank 2) |
| P0022 | Intake Camshaft Position Timing – Over-Retarded (Bank 2) |
| P0023 | Exhaust Camshaft Position Actuator Circuit / Open (Bank 2) |
| P0024 | Exhaust Camshaft Position Timing – Over-Advanced (Bank 2) |
| P0025 | Exhaust Camshaft Position Timing – Over-Retarded (Bank 2) |
| P0026 | Intake Valve Control Solenoid Circuit Range/Performance (Bank 2) |
| P0027 | Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2) |
| P0028 | Intake Valve Control Solenoid Circuit Range/Performance (Bank 2) |
| P0029 | Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2) |
| P0030 | Heated Oxygen Sensor (H02S) Heater Control Circuit Bank 2 Sensor 1 |
| P0031 | Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 1 |
| P0032 | Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 1 |
| P0033 | Turbo/Super Charger Bypass Valve Control Circuit / Open |
| P0034 | Turbo/Super Charger Bypass Valve Control Circuit Low |
| P0035 | Turbo/Super Charger Bypass Valve Control Circuit High |
| P0036 | Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 2 Sensor 2 |
| P0037 | Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 2 |
| P0038 | Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 2 |
| P0039 | Turbo/Super Charger Bypass Valve Control Circuit Range/Performance |
| P0040 | Oxygen Sensor Signals Swapped Bank 2 Sensor 1 / Bank 2 Sensor 1 |
| P0041 | Oxygen Sensor Signals Swapped Bank 2 Sensor 2 / Bank 2 Sensor 2 |
| P0042 | HO2S Heater Control Circuit (Bank 2, Sensor 3) |
| P0043 | HO2S Heater Control Circuit Low (Bank 2, Sensor 3) |
| P0044 | HO2S Heater Control Circuit High (Bank 2, Sensor 3) |
| P0046 | Turbo/Super Charger Boost Control Solenoid Circuit / Open |
| P0046 | Turbo/Super Charger Boost Control Solenoid Circuit Range/Performance |
| P0047 | Turbo/Super Charger Boost Control Solenoid Circuit Low |
| P0048 | Turbo/Super Charger Boost Control Solenoid Circuit High |
| P0049 | Turbo/Super Charger Turbine Overspeed |
| P0050 | Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 1 |
| P0051 | Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 1 |
| P0052 | Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 1 |
| P0053 | HO2S Heater Resistance Bank 2 Sensor 1 (PCM) |
| P0054 | HO2S Heater Resistance Bank 2 Sensor 2 (PCM) |
| P0055 | HO2S Heater Resistance Bank 2 Sensor 3 (PCM) |
| P0056 | Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 2 |
| P0057 | Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 2 Sensor 2 |
| P0058 | Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 2 Sensor 2 |
| P0059 | HO2S Heater Resistance (Bank 2, Sensor 1) |
| P0060 | HO2S Heater Resistance (Bank 2, Sensor 2) |
| P0061 | HO2S Heater Resistance (Bank 2, Sensor 3) |
| P0062 | HO2S Heater Control Circuit (Bank 2, Sensor 3) |
| P0063 | HO2S Heater Control Circuit Low (Bank 2, Sensor 3) |
| P0064 | HO2S Heater Control Circuit High (Bank 2, Sensor 3) |
| P0065 | Air Assisted Injector Control Range/Performance |
| P0066 | Air Assisted Injector Control Circuit or Circuit Low |
| P0067 | Air Assisted Injector Control Circuit or Circuit High |
| P0068 | MAP / MAF – Throttle Position Correlation |
| P0069 | MAP – Barometric Pressure Correlation |
| P0070 | Ambient Air Temperature Sensor Circuit |
| P0071 | Ambient Air Temperature Sensor Range/Performance |
| P0072 | Ambient Air Temperature Sensor Circuit Low Input |
| P0073 | Ambient Air Temperature Sensor Circuit High Input |
| P0074 | Ambient Air Temperature Sensor Circuit Intermittent/Erratic |
| P0075 | Intake Valve Control Circuit (Bank 2) |
| P0076 | Intake Valve Control Circuit Low (Bank 2) |
| P0077 | Intake Valve Control Circuit High (Bank 2) |
| P0078 | Exhaust Valve Control Circuit (Bank 2) |
| P0079 | Exhaust Valve Control Circuit Low (Bank 2) |
| P0080 | Exhaust Valve Control Circuit High (Bank 2) |
| P0081 | Intake Valve Control Circuit (Bank 2) |
| P0082 | Intake Valve Control Circuit Low (Bank 2) |
| P0083 | Intake Valve Control Circuit High (Bank 2) |
| P0084 | Exhaust Valve Control Circuit (Bank 2) |
| P0085 | Exhaust Valve Control Circuit Low (Bank 2) |
| P0086 | Exhaust Valve Control Circuit High (Bank 2) |
| P0087 | Fuel Rail/System Pressure – Too Low |
| P0088 | Fuel Rail/System Pressure – Too High |
| P0089 | Fuel Pressure Regulator Performance |
| P0090 | Fuel Pressure Regulator Control Circuit |
| P0091 | Fuel Pressure Regulator Control Circuit Low |
| P0092 | Fuel Pressure Regulator Control Circuit High |
| P0093 | Fuel System Leak Detected – Large Leak |
| P0094 | Fuel System Leak Detected – Small Leak |
| P0095 | Intake Air Temperature Sensor 2 Circuit |
| P0096 | Intake Air Temperature Sensor 2 Circuit Range/Performance |
| P0097 | Intake Air Temperature Sensor 2 Circuit Low Input |
| P0098 | Intake Air Temperature Sensor 2 Circuit High Input |
| P0099 | Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic |
Standard Fault Codes (DTC) from P0100 to P0199
| Code | Description |
|---|---|
| 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 |
| P0110 | Intake Air Temperature Circuit Malfunction More details… |
| P0111 | Intake Air Temperature Circuit Range/Performance Problem |
| P0112 | Intake Air Temperature Circuit Low Input |
| 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 Pedal Position Sensor/Switch A Circuit Malfunction |
| P0121 | Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem |
| P0122 | Throttle/Pedal Position Sensor/Switch A Circuit Low Input |
| P0123 | Throttle/Pedal Position Sensor/Switch A Circuit High Input |
| P0124 | Throttle/Pedal Position Sensor/Switch A Circuit Intermittent |
| P0125 | Insufficient Coolant Temperature for Closed Loop Fuel Control |
| P0126 | Insufficient Coolant Temperature for Stable Operation |
| P0127 | Intake Air Temperature Too High |
| P0128 | Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature) |
| P0129 | Barometric Pressure Too Low |
| P0130 | O2 Sensor Circuit Malfunction (Bank 2 Sensor 1) |
| P0131 | O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1) |
| P0132 | O2 Sensor Circuit High Voltage (Bank 2 Sensor 1) |
| P0133 | O2 Sensor Circuit Slow Response (Bank 2 Sensor 1) |
| P0134 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1) |
| P0135 | O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) |
| P0136 | O2 Sensor Circuit Malfunction (Bank 1 Sensor 2) |
| P0137 | O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2) |
| P0138 | O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) |
| P0139 | O2 Sensor Circuit Slow Response (Bank 1 Sensor 2) |
| P0140 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2) |
| P0141 | O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2) |
| P0142 | O2 Sensor Circuit Malfunction (Bank 2 Sensor 3) |
| P0143 | O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3) |
| P0144 | O2 Sensor Circuit High Voltage (Bank 2 Sensor 3) |
| P0145 | O2 Sensor Circuit Slow Response (Bank 2 Sensor 3) |
| P0146 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3) |
| P0147 | O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 3) |
| P0148 | Fuel Delivery Error |
| P0149 | Fuel Timing Error |
| P0150 | O2 Sensor Circuit Malfunction (Bank 2 Sensor 1) |
| P0151 | O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1) |
| P0152 | O2 Sensor Circuit High Voltage (Bank 2 Sensor 1) |
| P0153 | O2 Sensor Circuit Slow Response (Bank 2 Sensor 1) |
| P0154 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1) |
| P0155 | O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) |
| P0156 | O2 Sensor Circuit Malfunction (Bank 2 Sensor 2) |
| P0157 | O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2) |
| P0158 | O2 Sensor Circuit High Voltage (Bank 2 Sensor 2) |
| P0159 | O2 Sensor Circuit Slow Response (Bank 2 Sensor 2) |
| P0160 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2) |
| P0161 | O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2) |
| P0162 | O2 Sensor Circuit Malfunction (Bank 2 Sensor 3) |
| P0163 | O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3) |
| P0164 | O2 Sensor Circuit High Voltage (Bank 2 Sensor 3) |
| P0165 | O2 Sensor Circuit Slow Response (Bank 2 Sensor 3) |
| P0166 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3) |
| P0167 | O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 3) |
| P0169 | Incorrect Fuel Composition |
| P0170 | Fuel Trim Malfunction (Bank 2) |
| P0171 | System Too Lean (Bank 2) |
| P0172 | System Too Rich (Bank 2) |
| 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 Performance |
| P0182 | Fuel Temperature Sensor A Circuit low Input |
| P0183 | Fuel Temperature Sensor A Circuit Intermittent |
| 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 |
Standard Fault Codes (DTC) from P0200 to P0299
| Code | Description |
|---|---|
| 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 Over Speed Condition |
| P0220 | Throttle/Pedal Position Sensor/Switch B Circuit Malfunction |
| P0221 | Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem |
| P0222 | Throttle/Pedal Position Sensor/Switch B Circuit Low Input |
| P0223 | Throttle/Pedal Position Sensor/Switch B Circuit High Input |
| P0224 | Throttle/Pedal Position Sensor/Switch B Circuit Intermittent |
| P0225 | Throttle/Pedal Position Sensor/Switch C Circuit Malfunction |
| P0226 | Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance Problem |
| P0227 | Throttle/Pedal Position Sensor/Switch C Circuit Low Input |
| P0228 | Throttle/Pedal Position Sensor/Switch C Circuit High Input |
| P0229 | Throttle/Pedal Position Sensor/Switch C Circuit Intermittent |
| P0230 | Fuel Pump Primary Circuit Malfunction |
| P0231 | Fuel Pump Secondary Circuit Low |
| P0232 | Fuel Pump Secondary Circuit Intermittent |
| 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 Circuit 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 Low (Cam/Rotor/Injector) |
| P0258 | Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector) |
| P0259 | Injection lump Fuel Metering Control B High (Cam/Rotor/Injector) |
| P0260 | Injection Pump Fuel Metering Control B Intermittent (Cam/Rotor/Injector) |
| P0261 | Cylinder 1 Injector Circuit Low |
| P0262 | Cylinder 1 Injector Circuit High |
| P0263 | Cylinder 1 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 5 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/Balance Fault |
| P0297 | Vehicle Overspeed Condition |
| P0298 | Engine Oil Over Temperature |
| P0299 | Turbo / Super Charger Underboost |
Understanding these common OBD2 codes, particularly those related to the air/fuel system, is crucial for diagnosing a wide range of engine performance issues. By learning to interpret these codes, you can gain valuable insights into your vehicle’s condition and take informed steps towards maintenance and repair.
Looking to diagnose your car effectively? Explore our range of OBD2 diagnostic tools and software to help you read and clear fault codes, ensuring your vehicle runs smoothly and efficiently.
