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9,253 diagnostic guides

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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.

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

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Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

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

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

Diagnostic codes

Showing 4681–4704 of 9253

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P21FAFuel Control System B Too Lean at Idle Bank 2Check soonFuel System30–120 minutes for initial diagnosisP21FA relates to fuel control system b too lean at idle bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P21FBFuel Control System B Too Rich at Idle Bank 2Check soonFuel System30–120 minutes for initial diagnosisP21FB relates to fuel control system b too rich at idle bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P21FCFuel Control System B Too Lean at Higher Load Bank 1Check soonFuel System30–120 minutes for initial diagnosisP21FC relates to fuel control system b too lean at higher load bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P21FDFuel Control System B Too Rich at Higher Load Bank 1Check soonFuel System30–120 minutes for initial diagnosisP21FD relates to fuel control system b too rich at higher load bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P21FEFuel Control System B Too Lean at Higher Load Bank 2Check soonFuel System30–120 minutes for initial diagnosisP21FE relates to fuel control system b too lean at higher load bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P21FFFuel Control System B Too Rich at Higher Load Bank 2Check soonFuel System30–120 minutes for initial diagnosisP21FF relates to fuel control system b too rich at higher load bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2200NOx Sensor Circuit Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2200 relates to nox sensor circuit bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2201NOx Sensor Circuit Range/Performance Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2201 relates to nox sensor circuit range/performance bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2202NOx Sensor Circuit Low Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2202 relates to nox sensor circuit low bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2203NOx Sensor Circuit High Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2203 relates to nox sensor circuit high bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2204NOx Sensor Circuit Intermittent Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2204 relates to nox sensor circuit intermittent bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2205NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2205 relates to nox sensor heater control circuit/open bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2206NOx Sensor Heater Control Circuit Low Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2206 relates to nox sensor heater control circuit low bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2207NOx Sensor Heater Control Circuit High Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2207 relates to nox sensor heater control circuit high bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2208NOx Sensor Heater Sense Circuit Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2208 relates to nox sensor heater sense circuit bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2209NOx Sensor Heater Sense Circuit Range/Performance Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2209 relates to nox sensor heater sense circuit range/performance bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P220ANOx Sensor Supply Voltage Circuit Bank 1 Sensor 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP220A relates to nox sensor supply voltage circuit bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P220BNOx Sensor Supply Voltage Circuit Bank 1 Sensor 2Check soonElectrical & Charging System30–120 minutes for initial diagnosisP220B relates to nox sensor supply voltage circuit bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P220CNOx Sensor Supply Voltage Circuit Bank 2 Sensor 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP220C relates to nox sensor supply voltage circuit bank 2 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P220DNOx Sensor Supply Voltage Circuit Bank 2 Sensor 2Check soonElectrical & Charging System30–120 minutes for initial diagnosisP220D relates to nox sensor supply voltage circuit bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P220ENOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP220E relates to nox sensor heater control circuit range/performance bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P220FNOx Sensor Heater Control Circuit Range/Performance Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP220F relates to nox sensor heater control circuit range/performance bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2210NOx Sensor Heater Sense Circuit Low Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2210 relates to nox sensor heater sense circuit low bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2211NOx Sensor Heater Sense Circuit High Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2211 relates to nox sensor heater sense circuit high bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.