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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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All severities9253 Low priority305 Check soon8256 Urgent621

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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 985–1008 of 1939

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P2226Barometric Pressure Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2226 relates to barometric pressure sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2227Barometric Pressure Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2227 relates to barometric pressure sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2228Barometric Pressure Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2228 relates to barometric pressure sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2229Barometric Pressure Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2229 relates to barometric pressure sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P222ABarometric Pressure Sensor B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP222A relates to barometric pressure sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P222BBarometric Pressure Sensor B Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP222B relates to barometric pressure sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P222CBarometric Pressure Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP222C relates to barometric pressure sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P222DBarometric Pressure Sensor B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP222D relates to barometric pressure sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P222EBarometric Pressure Sensor B Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP222E relates to barometric pressure sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P222FBarometric Pressure Sensor A/B CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP222F relates to barometric pressure sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2230Barometric Pressure Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2230 relates to barometric pressure sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2231O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2231 relates to o2 sensor signal circuit shorted to heater circuit bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2232O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2232 relates to o2 sensor signal circuit shorted to heater circuit bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2233O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3Check soonSensors & Electronics30–120 minutes for initial diagnosisP2233 relates to o2 sensor signal circuit shorted to heater circuit bank 1 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2234O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2234 relates to o2 sensor signal circuit shorted to heater circuit bank 2 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2235O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2235 relates to o2 sensor signal circuit shorted to heater circuit bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2236O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 3Check soonSensors & Electronics30–120 minutes for initial diagnosisP2236 relates to o2 sensor signal circuit shorted to heater circuit bank 2 sensor 3. Check the fault conditions and vehicle-specific procedure before replacing parts.P2237O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2237 relates to o2 sensor positive current control circuit/open bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2238O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2238 relates to o2 sensor positive current control circuit low bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2239O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2239 relates to o2 sensor positive current control circuit high bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P223AReductant Heater E Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP223A relates to reductant heater e control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P223BReductant Heater F Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP223B relates to reductant heater f control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P223CO2 Sensor Pumping Current Range/Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP223C relates to o2 sensor pumping current range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P223DO2 Sensor Pumping Current Range/Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP223D relates to o2 sensor pumping current range/performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.