Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

Sensors & Electronics Check soon Clear all

Quick browse

Choose a vehicle system

Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 1489–1512 of 1939

Most searched first

P266AA Rocker Arm Actuator Position Sensor Circuit Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP266A relates to a rocker arm actuator position sensor circuit bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P266BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP266B relates to a rocker arm actuator position sensor circuit range/performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P266CA Rocker Arm Actuator Position Sensor Circuit Low Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP266C relates to a rocker arm actuator position sensor circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P266DA Rocker Arm Actuator Position Sensor Circuit High Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP266D relates to a rocker arm actuator position sensor circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P266EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP266E relates to a rocker arm actuator position sensor circuit intermittent/erratic bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P266FA/C Refrigerant Distribution Valve A Control Circuit Driver Current/Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP266F relates to a/c refrigerant distribution valve a control circuit driver current/temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2675Air Cleaner Inlet Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2675 relates to air cleaner inlet control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2676Air Cleaner Inlet Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2676 relates to air cleaner inlet control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2677Air Cleaner Inlet Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2677 relates to air cleaner inlet control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P267AB Rocker Arm Actuator Position Sensor Circuit Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP267A relates to b rocker arm actuator position sensor circuit bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P267BB Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP267B relates to b rocker arm actuator position sensor circuit range/performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P267CB Rocker Arm Actuator Position Sensor Circuit Low Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP267C relates to b rocker arm actuator position sensor circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P267DB Rocker Arm Actuator Position Sensor Circuit High Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP267D relates to b rocker arm actuator position sensor circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P267EB Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP267E relates to b rocker arm actuator position sensor circuit intermittent/erratic bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P267FControl Module Internal Temperature Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP267F relates to control module internal temperature sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P269BExhaust Aftertreatment Glow Plug Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269B relates to exhaust aftertreatment glow plug control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P269CExhaust Aftertreatment Glow Plug Control PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269C relates to exhaust aftertreatment glow plug control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P269DExhaust Aftertreatment Glow Plug Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269D relates to exhaust aftertreatment glow plug control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P269EExhaust Aftertreatment Glow Plug Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269E relates to exhaust aftertreatment glow plug control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P269FExhaust Aftertreatment Glow Plug Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269F relates to exhaust aftertreatment glow plug circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26A0Exhaust Aftertreatment Glow Plug PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26A0 relates to exhaust aftertreatment glow plug performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26A1Exhaust Aftertreatment Glow Plug Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26A1 relates to exhaust aftertreatment glow plug circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26A2Exhaust Aftertreatment Glow Plug Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26A2 relates to exhaust aftertreatment glow plug circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26C5Exhaust Flow Control Valve A Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26C5 relates to exhaust flow control valve a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.