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.

Engine Problems 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 1–24 of 987

Most searched first

P0128Coolant Thermostat Below Regulating TemperatureCheck soonEngine Problems30–75 minutesDiagnose P0128 thermostat code. Learn why your engine isn't reaching operating temperature.P000AA Camshaft Position Slow Response Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP000A relates to a camshaft position slow response bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P000BB Camshaft Position Slow Response Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP000B relates to b camshaft position slow response bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P000CA Camshaft Position Slow Response Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP000C relates to a camshaft position slow response bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P000DB Camshaft Position Slow Response Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP000D relates to b camshaft position slow response bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P001AA Camshaft Profile Actuator A Control Circuit/Open Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP001A relates to a camshaft profile actuator a control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P001BA Camshaft Profile Actuator A Control Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP001B relates to a camshaft profile actuator a control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P001CA Camshaft Profile Actuator A Control Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP001C relates to a camshaft profile actuator a control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P001DA Camshaft Profile Actuator A Control Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP001D relates to a camshaft profile actuator a control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P001EA Camshaft Profile Actuator A Control Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP001E relates to a camshaft profile actuator a control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P001FA Camshaft Profile Actuator A Control Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP001F relates to a camshaft profile actuator a control circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P002AB Camshaft Profile Actuator A Control Circuit/Open Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP002A relates to b camshaft profile actuator a control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P002BB Camshaft Profile Actuator A Control Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP002B relates to b camshaft profile actuator a control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P002CB Camshaft Profile Actuator A Control Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP002C relates to b camshaft profile actuator a control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P002DB Camshaft Profile Actuator A Control Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP002D relates to b camshaft profile actuator a control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P002EB Camshaft Profile Actuator A Control Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP002E relates to b camshaft profile actuator a control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P002FB Camshaft Profile Actuator A Control Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP002F relates to b camshaft profile actuator a control circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P003CA Camshaft Profile Actuator A Control Performance/Stuck Off Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP003C relates to a camshaft profile actuator a control performance/stuck off bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P003DA Camshaft Profile Actuator A Control Stuck On Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP003D relates to a camshaft profile actuator a control stuck on bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P003EA Camshaft Profile Actuator A Control Performance/Stuck Off Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP003E relates to a camshaft profile actuator a control performance/stuck off bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P003FA Camshaft Profile Actuator A Control Stuck On Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP003F relates to a camshaft profile actuator a control stuck on bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P005AB Camshaft Profile Actuator A Control Performance/Stuck Off Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP005A relates to b camshaft profile actuator a control performance/stuck off bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P005BB Camshaft Profile Actuator A Control Stuck On Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP005B relates to b camshaft profile actuator a control stuck on bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P005CB Camshaft Profile Actuator A Control Performance/Stuck Off Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP005C relates to b camshaft profile actuator a control performance/stuck off bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.