Fault codes P2Axx: engine and emissions: additional codes (1)
Engine and transmission codes common to all makes (SAE J2012 standard).
Official codes: 256, from smallest to largest. Tap a code to get a direct link to share.
| Code | Meaning |
|---|---|
| P2A00 | O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 |
| P2A01 | O2 Sensor Circuit Range/Performance Bank 1 Sensor 2 |
| P2A02 | O2 Sensor Circuit Range/Performance Bank 1 Sensor 3 |
| P2A03 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 1 |
| P2A04 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 2 |
| P2A05 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 3 |
| P2A06 | O2 Sensor Circuit Range/Performance Bank 1 Sensor 4 |
| P2A07 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 4 |
| P2A08 | O2 Sensor Negative Voltage Bank 1 Sensor 3 |
| P2A09 | O2 Sensor Negative Voltage Bank 2 Sensor 1 |
| P2A0A | Manifold Absolute Pressure Sensor B Circuit |
| P2A0B | Manifold Absolute Pressure Sensor B Circuit Range/Performance |
| P2A0C | Manifold Absolute Pressure Sensor B Circuit Low |
| P2A0D | Manifold Absolute Pressure Sensor B Circuit High |
| P2A0E | Manifold Absolute Pressure Sensor B Circuit Intermittent/Erratic |
| P2A0F | Fuel Supply Heater Performance |
| P2A10 | O2 Sensor Negative Voltage Bank 2 Sensor 2 |
| P2A11 | O2 Sensor Negative Voltage Bank 2 Sensor 3 |
| P2A12 | Injection Pump Fuel Metering Control C (Cam/Rotor/Injector) |
| P2A13 | Injection Pump Fuel Metering Control C Range/Performance (Cam/Rotor/Injector) |
| P2A14 | Injection Pump Fuel Metering Control C Low (Cam/Rotor/Injector) |
| P2A15 | Injection Pump Fuel Metering Control C High (Cam/Rotor/Injector) |
| P2A16 | Injection Pump Fuel Metering Control D (Cam/Rotor/Injector) |
| P2A17 | Injection Pump Fuel Metering Control D Range/Performance (Cam/Rotor/Injector) |
| P2A18 | Injection Pump Fuel Metering Control D Low (Cam/Rotor/Injector) |
| P2A19 | Injection Pump Fuel Metering Control D High (Cam/Rotor/Injector) |
| P2A1A | Injection Pump Fuel Metering Control E (Cam/Rotor/Injector) |
| P2A1B | Injection Pump Fuel Metering Control E Range/Performance (Cam/Rotor/Injector) |
| P2A1C | Injection Pump Fuel Metering Control E Low (Cam/Rotor/Injector) |
| P2A1D | Injection Pump Fuel Metering Control E High (Cam/Rotor/Injector) |
| P2A1E | Injection Pump Fuel Metering Control F (Cam/Rotor/Injector) |
| P2A1F | Injection Pump Fuel Metering Control F Range/Performance (Cam/Rotor/Injector) |
| P2A20 | Injection Pump Fuel Metering Control F Low (Cam/Rotor/Injector) |
| P2A21 | Injection Pump Fuel Metering Control F High (Cam/Rotor/Injector) |
| P2A22 | Alternative Fuel Tank Shutoff Valve B Control Circuit/Open |
| P2A23 | Alternative Fuel Tank Shutoff Valve B Control Circuit Performance/Stuck Off |
| P2A24 | Alternative Fuel Tank Shutoff Valve B Control Circuit Low |
| P2A25 | Alternative Fuel Tank Shutoff Valve B Control Circuit High |
| P2A26 | Alternative Fuel Tank Shutoff Valve C Control Circuit/Open |
| P2A27 | Alternative Fuel Tank Shutoff Valve C Control Circuit Performance/Stuck Off |
| P2A28 | Alternative Fuel Tank Shutoff Valve C Control Circuit Low |
| P2A29 | Alternative Fuel Tank Shutoff Valve C Control Circuit High |
| P2A2A | Alternative Fuel Tank Shutoff Valve D Control Circuit/Open |
| P2A2B | Alternative Fuel Tank Shutoff Valve D Control Circuit Performance/Stuck Off |
| P2A2C | Alternative Fuel Tank Shutoff Valve D Control Circuit Low |
| P2A2D | Alternative Fuel Tank Shutoff Valve D Control Circuit High |
| P2A2E | Alternative Fuel Tank Shutoff Valve E Control Circuit/Open |
| P2A2F | Alternative Fuel Tank Shutoff Valve E Control Circuit Performance/Stuck Off |
| P2A30 | Alternative Fuel Tank Shutoff Valve E Control Circuit Low |
| P2A31 | Alternative Fuel Tank Shutoff Valve E Control Circuit High |
| P2A32 | AFCM Power Relay Control Circuit/Open |
| P2A33 | AFCM Power Relay Control Circuit Low |
| P2A34 | AFCM Power Relay Control Circuit High |
| P2A35 | AFCM Power Relay Sense Circuit |
| P2A36 | AFCM Power Relay Sense Circuit Low |
| P2A37 | AFCM Power Relay Sense Circuit High |
| P2A38 | O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 3 |
| P2A39 | O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 3 |
| P2A3A | O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 3 |
| P2A3B | O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 3 |
| P2A3C | O2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 3 |
| P2A3D | O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 3 |
| P2A3E | Alternative Fuel Delivery Error |
| P2A3F | Excessive Time to Enter Alternative Fuel Control |
| P2A40 | Alternative Fuel System - Injector Leakage to Rail Detected |
| P2A41 | Alternative Fuel Tank B Pressure Sensor Circuit |
| P2A42 | Alternative Fuel Tank B Pressure Sensor Range/Performance |
| P2A43 | Alternative Fuel Tank B Pressure Sensor Circuit Low |
| P2A44 | Alternative Fuel Tank B Pressure Sensor Circuit High |
| P2A45 | Alternative Fuel Tank B Pressure Sensor Circuit Intermittent/Erratic |
| P2A46 | Alternative Fuel Tank C Pressure Sensor Circuit |
| P2A47 | Alternative Fuel Tank C Pressure Sensor Range/Performance |
| P2A48 | Alternative Fuel Tank C Pressure Sensor Circuit Low |
| P2A49 | Alternative Fuel Tank C Pressure Sensor Circuit High |
| P2A4A | Alternative Fuel Tank C Pressure Sensor Circuit Intermittent/Erratic |
| P2A4B | Alternative Fuel Temperature Sensor Circuit |
| P2A4C | Alternative Fuel Temperature Sensor Range/Performance |
| P2A4D | Alternative Fuel Temperature Sensor Circuit Low |
| P2A4E | Alternative Fuel Temperature Sensor Circuit High |
| P2A4F | Alternative Fuel Temperature Sensor Circuit Intermittent/Erratic |
| P2A50 | Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit |
| P2A51 | Alternative Fuel Vaporizer A Outlet Temperature Sensor Range/Performance |
| P2A52 | Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit Low |
| P2A53 | Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit High |
| P2A54 | Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit Intermittent/Erratic |
| P2A55 | Alternative Fuel Vaporizer B Outlet Temperature Sensor Circuit |
| P2A56 | Alternative Fuel Vaporizer B Outlet Temperature Sensor Range/Performance |
| P2A57 | Alternative Fuel Vaporizer B Outlet Temperature Sensor Circuit Low |
| P2A58 | Alternative Fuel Vaporizer B Outlet Temperature Sensor Circuit High |
| P2A59 | Alternative Fuel Vaporizer B Outlet Temperature Sensor Circuit Intermittent/Erratic |
| P2A5A | Alternative Fuel Vaporizer C Outlet Temperature Sensor Circuit |
| P2A5B | Alternative Fuel Vaporizer C Outlet Temperature Sensor Range/Performance |
| P2A5C | Alternative Fuel Vaporizer C Outlet Temperature Sensor Circuit Low |
| P2A5D | Alternative Fuel Vaporizer C Outlet Temperature Sensor Circuit High |
| P2A5E | Alternative Fuel Vaporizer C Outlet Temperature Sensor Circuit Intermittent/Erratic |
| P2A5F | Alternative Fuel Tank B Level Sensor Circuit |
| P2A60 | Alternative Fuel Tank B Level Sensor Range/Performance |
| P2A61 | Alternative Fuel Tank B Level Sensor Circuit Low |
| P2A62 | Alternative Fuel Tank B Level Sensor Circuit High |
| P2A63 | Alternative Fuel Tank B Level Sensor Circuit Intermittent/Erratic |
| P2A64 | Alternative Fuel Tank C Level Sensor Circuit |
| P2A65 | Alternative Fuel Tank C Level Sensor Range/Performance |
| P2A66 | Alternative Fuel Tank C Level Sensor Circuit Low |
| P2A67 | Alternative Fuel Tank C Level Sensor Circuit High |
| P2A68 | Alternative Fuel Tank C Level Sensor Circuit Intermittent/Erratic |
| P2A69 | Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit |
| P2A6A | Alternative Fuel Rail Pressure Regulator Pressure Sensor Range/Performance |
| P2A6B | Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit Low |
| P2A6C | Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit High |
| P2A6D | Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit Intermittent/Erratic |
| P2A6E | Alternative Fuel Rail Pressure Regulator Inlet Pressure Too Low |
| P2A6F | Alternative Fuel Rail Pressure Regulator Inlet Pressure Too High |
| P2A70 | Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit |
| P2A71 | Alternative Fuel Hydraulic Fuel Pump Select Valve Control Range/Performance |
| P2A72 | Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Low |
| P2A73 | Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit High |
| P2A74 | Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Intermittent/Erratic |
| P2A75 | Alternative Fuel Hydraulic Pump Pressure Sensor Circuit |
| P2A76 | Alternative Fuel Hydraulic Pump Pressure Sensor Range/Performance |
| P2A77 | Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Low |
| P2A78 | Alternative Fuel Hydraulic Pump Pressure Sensor Circuit High |
| P2A79 | Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Intermittent/Erratic |
| P2A7A | Alternative Fuel Hydraulic Pressure Sensor Circuit |
| P2A7B | Alternative Fuel Hydraulic Pressure Sensor Range/Performance |
| P2A7C | Alternative Fuel Hydraulic Pressure Sensor Circuit Low |
| P2A7D | Alternative Fuel Hydraulic Pressure Sensor Circuit High |
| P2A7E | Alternative Fuel Hydraulic Pressure Sensor Circuit Intermittent/Erratic |
| P2A7F | Alternative Fuel Pump A Compression Stroke Valve Control Circuit/Open |
| P2A80 | Alternative Fuel Pump A Compression Stroke Valve Control Circuit Range/Performance |
| P2A81 | Alternative Fuel Pump A Compression Stroke Valve Control Circuit Low |
| P2A82 | Alternative Fuel Pump A Compression Stroke Valve Control Circuit High |
| P2A83 | Alternative Fuel Pump B Compression Stroke Valve Control Circuit/Open |
| P2A84 | Alternative Fuel Pump B Compression Stroke Valve Control Circuit Range/Performance |
| P2A85 | Alternative Fuel Pump B Compression Stroke Valve Control Circuit Low |
| P2A86 | Alternative Fuel Pump B Compression Stroke Valve Control Circuit High |
| P2A87 | Alternative Fuel Pump C Compression Stroke Valve Control Circuit/Open |
| P2A88 | Alternative Fuel Pump C Compression Stroke Valve Control Circuit Range/Performance |
| P2A89 | Alternative Fuel Pump C Compression Stroke Valve Control Circuit Low |
| P2A8A | Alternative Fuel Pump C Compression Stroke Valve Control Circuit High |
| P2A8B | Alternative Fuel Vaporizer A Performance |
| P2A8C | Alternative Fuel Vaporizer B Performance |
| P2A8D | Alternative Fuel Vaporizer C Performance |
| P2A8E | Alternative Fuel Pump A Performance |
| P2A8F | Alternative Fuel Pump B Performance |
| P2A90 | Alternative Fuel Pump C Performance |
| P2A91 | Alternative Fuel Tank Select Valve A Control Circuit/Open |
| P2A92 | Alternative Fuel Tank Select Valve A Control Performance |
| P2A93 | Alternative Fuel Tank Select Valve A Control Circuit Low |
| P2A94 | Alternative Fuel Tank Select Valve A Control Circuit High |
| P2A95 | Alternative Fuel Tank Select Valve B Control Circuit/Open |
| P2A96 | Alternative Fuel Tank Select Valve B Control Circuit Performance |
| P2A97 | Alternative Fuel Tank Select Valve B Control Circuit Low |
| P2A98 | Alternative Fuel Tank Select Valve B Control Circuit High |
| P2A99 | Alternative Fuel Tank Select Valve C Control Circuit/Open |
| P2A9A | Alternative Fuel Tank Select Valve C Control Circuit Performance |
| P2A9B | Alternative Fuel Tank Select Valve C Control Circuit Low |
| P2A9C | Alternative Fuel Tank Select Valve C Control Circuit High |
| P2A9D | Alternative Fuel High Pressure System Small Leak |
| P2A9E | Alternative Fuel Return Line Valve Control Circuit/Open |
| P2A9F | Alternative Fuel Return Line Valve Control Circuit Range/Performance |
| P2AA0 | Alternative Fuel Return Line Valve Control Circuit Low |
| P2AA1 | Alternative Fuel Return Line Valve Control Circuit High |
| P2AA2 | Alternative Fuel Return Line Insufficient Flow |
| P2AA3 | Cold Start EGR B Flow Insufficient Detected |
| P2AA4 | Cold Start EGR B Flow Excessive Detected |
| P2AA5 | EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1 |
| P2AA6 | EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 2 |
| P2AA7 | Engine Coolant Bypass Valve B Position Sensor Circuit |
| P2AA8 | Engine Coolant Bypass Valve B Position Sensor Range/Performance |
| P2AA9 | Engine Coolant Bypass Valve B Position Sensor Circuit Low |
| P2AAA | Engine Coolant Bypass Valve B Position Sensor Circuit High |
| P2AAB | Engine Coolant Bypass Valve B Position Sensor Circuit Intermittent/Erratic |
| P2AAC | Diesel Fuel Presence Sensor Circuit |
| P2AAD | Diesel Fuel Presence Sensor Range/Performance |
| P2AAE | Diesel Fuel Presence Sensor Circuit Low |
| P2AAF | Diesel Fuel Presence Sensor Circuit High |
| P2AB0 | Particulate Matter Sensor Processor Performance |
| P2AB1 | Catalyst Heater Control Module Performance |
| P2AB2 | Catalyst Heater Control Module Supply Voltage |
| P2AB3 | Cold Start Intake Manifold Runner Control Stuck Open Bank 1 |
| P2AB4 | Cold Start Intake Manifold Runner Control Stuck Open Bank 2 |
| P2AB5 | Cold Start Intake Manifold Runner Control Stuck Closed Bank 1 |
| P2AB6 | Cold Start Intake Manifold Runner Control Stuck Closed Bank 2 |
| P2AB7 | Wastegate Position Sensor A Circuit |
| P2AB8 | Wastegate Position Sensor A Circuit Low |
| P2AB9 | Wastegate Position Sensor A Circuit High |
| P2ABA | Wastegate Position Sensor B Circuit |
| P2ABB | Wastegate Position Sensor B Circuit Low |
| P2ABC | Wastegate Position Sensor B Circuit High |
| P2ABD | Turbocharger/Supercharger Wastegate Actuator A Driver Current/Temperature Too High |
| P2ABE | Turbocharger/Supercharger Wastegate Actuator B Driver Current/Temperature Too High |
| P2ABF | Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 1 |
| P2AC0 | Intake Air O2 Sensor Reference Voltage Circuit Range/Performance Bank 1 |
| P2AC1 | Intake Air O2 Sensor Reference Voltage Circuit Low Bank 1 |
| P2AC2 | Intake Air O2 Sensor Reference Voltage Circuit High Bank 1 |
| P2AC3 | Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 2 |
| P2AC4 | Intake Air O2 Sensor Reference Voltage Circuit Range/Performance Bank 2 |
| P2AC5 | Intake Air O2 Sensor Reference Voltage Circuit Low Bank 2 |
| P2AC6 | Intake Air O2 Sensor Reference Voltage Circuit High Bank 2 |
| P2AC7 | Charge Air Cooler Coolant Temperature Sensor B Circuit |
| P2AC8 | Charge Air Cooler Coolant Temperature Sensor B Range/Performance |
| P2AC9 | Charge Air Cooler Coolant Temperature Sensor B Circuit Low |
| P2ACA | Charge Air Cooler Coolant Temperature Sensor B Circuit High |
| P2ACB | Charge Air Cooler Coolant Temperature Sensor B Circuit Intermittent/Erratic |
| P2ACC | Reductant Temperature Sensor B Circuit |
| P2ACD | Reductant Temperature Sensor B Range/Performance |
| P2ACE | Reductant Temperature Sensor B Circuit Low |
| P2ACF | Reductant Temperature Sensor B Circuit High |
| P2AD0 | Reductant Temperature Sensor B Circuit Intermittent/Erratic |
| P2AD1 | Throttle/Pedal Position Sensor/Switch C/G Voltage Correlation |
| P2AD2 | Throttle/Pedal Position Sensor/Switch B/G Voltage Correlation |
| P2AD3 | Throttle/Pedal Position Sensor/Switch A/G Voltage Correlation |
| P2AD4 | Intermediate System Voltage Low |
| P2AD5 | Intermediate System Voltage High |
| P2AD6 | Reductant Pump Motor Position Sensor Circuit |
| P2AD7 | Reductant Pump Motor Position Sensor Range/Performance |
| P2AD8 | Reductant Pump Motor Position Sensor Circuit Low |
| P2AD9 | Reductant Pump Motor Position Sensor Circuit High |
| P2ADA | Reductant Tank Temperature Sensor B Range/Performance |
| P2ADB | Reductant Tank Temperature Sensor B Circuit Low |
| P2ADC | Reductant Tank Temperature Sensor B Circuit High |
| P2ADD | Reductant Tank Temperature Sensor B Circuit Intermittent/Erratic |
| P2ADE | Reductant Tank Temperature Sensor B Circuit |
| P2ADF | Intake Air System Leak Bank 2 |
| P2AE0 | Intake Air O2 Sensor Pumping Current Trim Circuit Open Bank 1 |
| P2AE1 | Intake Air O2 Sensor Pumping Current Trim Circuit Low Bank 1 |
| P2AE2 | Intake Air O2 Sensor Pumping Current Trim Circuit High Bank 1 |
| P2AE3 | Intake Air O2 Sensor Pumping Current Circuit Open Bank 1 |
| P2AE4 | Intake Air O2 Sensor Pumping Current Circuit Low Bank 1 |
| P2AE5 | Intake Air O2 Sensor Pumping Current Circuit High Bank 1 |
| P2AE6 | Intake Air O2 Sensor Negative Current Control Circuit Open Bank 1 |
| P2AE7 | Intake Air O2 Sensor Negative Current Control Circuit Low Bank 1 |
| P2AE8 | Intake Air O2 Sensor Negative Current Control Circuit High Bank 1 |
| P2AE9 | Intake Air O2 Sensor Pumping Current Trim Circuit Open Bank 2 |
| P2AEA | Intake Air O2 Sensor Pumping Current Trim Circuit Low Bank 2 |
| P2AEB | Intake Air O2 Sensor Pumping Current Trim Circuit High Bank 2 |
| P2AEC | Intake Air O2 Sensor Pumping Current Circuit Open Bank 2 |
| P2AED | Intake Air O2 Sensor Pumping Current Circuit Low Bank 2 |
| P2AEE | Intake Air O2 Sensor Pumping Current Circuit High Bank 2 |
| P2AEF | Intake Air O2 Sensor Negative Current Control Circuit Open Bank 2 |
| P2AF0 | Intake Air O2 Sensor Negative Current Control Circuit Low Bank 2 |
| P2AF1 | Intake Air O2 Sensor Negative Current Control Circuit High Bank 2 |
| P2AF2 | Starter Relay C Control Circuit/Open |
| P2AF3 | Starter Relay C Control Circuit Low |
| P2AF4 | Starter Relay C Control Circuit High |
| P2AF5 | Starter Relay C Stuck On |
| P2AF6 | Starter Relay C Stuck Off |
| P2AF7 | Starter Relay D Control Circuit/Open |
| P2AF8 | Starter Relay D Control Circuit Low |
| P2AF9 | Starter Relay D Control Circuit High |
| P2AFA | Starter Relay D Stuck On |
| P2AFB | Starter Relay D Stuck Off |
| P2AFC | Engine Coolant Temperature Sensor 4 Circuit |
| P2AFD | Engine Coolant Temperature Sensor 4 Range/Performance |
| P2AFE | Engine Coolant Temperature Sensor 4 Circuit Low |
| P2AFF | Engine Coolant Temperature Sensor 4 Circuit High |
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Official meanings: OBDex (public domain, CC0). Manufacturer codes: dtc-database (MIT license), probable meanings not verified by the manufacturers. The same meaning can vary depending on the model: always have a diagnosis confirmed by a professional.