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 721–744 of 1939

Most searched first

P2008Intake Manifold Runner Control Circuit/Open Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2008 relates to intake manifold runner control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2009Intake Manifold Runner Control Circuit Low Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2009 relates to intake manifold runner control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P200AIntake Manifold Runner Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP200A relates to intake manifold runner performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P200BIntake Manifold Runner Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP200B relates to intake manifold runner performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2010Intake Manifold Runner Control Circuit High Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2010 relates to intake manifold runner control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2011Intake Manifold Runner Control Circuit/Open Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2011 relates to intake manifold runner control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2012Intake Manifold Runner Control Circuit Low Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2012 relates to intake manifold runner control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2013Intake Manifold Runner Control Circuit High Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2013 relates to intake manifold runner control circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2014Intake Manifold Runner Position Sensor/Switch Circuit Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2014 relates to intake manifold runner position sensor/switch circuit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2015Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2015 relates to intake manifold runner position sensor/switch circuit range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2016Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2016 relates to intake manifold runner position sensor/switch circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2017Intake Manifold Runner Position Sensor/Switch Circuit High Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2017 relates to intake manifold runner position sensor/switch circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2018Intake Manifold Runner Position Sensor/Switch Circuit Intermittent Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2018 relates to intake manifold runner position sensor/switch circuit intermittent bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2019Intake Manifold Runner Position Sensor/Switch Circuit Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2019 relates to intake manifold runner position sensor/switch circuit bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P201DIntake Manifold Runner Control Actuator Internal Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP201D relates to intake manifold runner control actuator internal performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P201EIntake Manifold Runner Control Actuator Internal Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP201E relates to intake manifold runner control actuator internal performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P201FReductant Pump A Stuck OnCheck soonSensors & Electronics30–120 minutes for initial diagnosisP201F relates to reductant pump a stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P2020Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2020 relates to intake manifold runner position sensor/switch circuit range/performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2021Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2021 relates to intake manifold runner position sensor/switch circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2022Intake Manifold Runner Position Sensor/Switch Circuit High Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2022 relates to intake manifold runner position sensor/switch circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2023Intake Manifold Runner Position Sensor/Switch Circuit Intermittent Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2023 relates to intake manifold runner position sensor/switch circuit intermittent bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P202AReductant Tank Heater Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP202A relates to reductant tank heater control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P202BReductant Tank Heater Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP202B relates to reductant tank heater control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P202CReductant Tank Heater Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP202C relates to reductant tank heater control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.