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.

Transmission Issues 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 673–696 of 833

Most searched first

P283AShift Fork B Position Circuit IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP283A relates to shift fork b position circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P283BShift Fork C Position CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP283B relates to shift fork c position circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P283CShift Fork C Position Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP283C relates to shift fork c position circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P283DShift Fork C Position Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP283D relates to shift fork c position circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P283EShift Fork C Position Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP283E relates to shift fork c position circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P283FShift Fork C Position Circuit IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP283F relates to shift fork c position circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P2840Shift Fork D Position CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP2840 relates to shift fork d position circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2841Shift Fork D Position Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP2841 relates to shift fork d position circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2842Shift Fork D Position Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP2842 relates to shift fork d position circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2843Shift Fork D Position Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP2843 relates to shift fork d position circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2844Shift Fork D Position Circuit IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP2844 relates to shift fork d position circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P2845Shift Fork A Position Sensor Incorrect Neutral Position IndicatedCheck soonTransmission Issues30–120 minutes for initial diagnosisP2845 relates to shift fork a position sensor incorrect neutral position indicated. Check the fault conditions and vehicle-specific procedure before replacing parts.P2846Shift Fork B Position Sensor Incorrect Neutral Position IndicatedCheck soonTransmission Issues30–120 minutes for initial diagnosisP2846 relates to shift fork b position sensor incorrect neutral position indicated. Check the fault conditions and vehicle-specific procedure before replacing parts.P2847Shift Fork C Position Sensor Incorrect Neutral Position IndicatedCheck soonTransmission Issues30–120 minutes for initial diagnosisP2847 relates to shift fork c position sensor incorrect neutral position indicated. Check the fault conditions and vehicle-specific procedure before replacing parts.P2848Shift Fork D Position Sensor Incorrect Neutral Position IndicatedCheck soonTransmission Issues30–120 minutes for initial diagnosisP2848 relates to shift fork d position sensor incorrect neutral position indicated. Check the fault conditions and vehicle-specific procedure before replacing parts.P2849Shift Fork A StuckCheck soonTransmission Issues30–120 minutes for initial diagnosisP2849 relates to shift fork a stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P284AShift Fork B StuckCheck soonTransmission Issues30–120 minutes for initial diagnosisP284A relates to shift fork b stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P284BShift Fork C StuckCheck soonTransmission Issues30–120 minutes for initial diagnosisP284B relates to shift fork c stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P284CShift Fork D StuckCheck soonTransmission Issues30–120 minutes for initial diagnosisP284C relates to shift fork d stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P284DShift Fork A Unrequested MovementCheck soonTransmission Issues30–120 minutes for initial diagnosisP284D relates to shift fork a unrequested movement. Check the fault conditions and vehicle-specific procedure before replacing parts.P284EShift Fork B Unrequested MovementCheck soonTransmission Issues30–120 minutes for initial diagnosisP284E relates to shift fork b unrequested movement. Check the fault conditions and vehicle-specific procedure before replacing parts.P284FShift Fork C Unrequested MovementCheck soonTransmission Issues30–120 minutes for initial diagnosisP284F relates to shift fork c unrequested movement. Check the fault conditions and vehicle-specific procedure before replacing parts.P2850Shift Fork D Unrequested MovementCheck soonTransmission Issues30–120 minutes for initial diagnosisP2850 relates to shift fork d unrequested movement. Check the fault conditions and vehicle-specific procedure before replacing parts.P2851Shift Fork Position Sensor A/B CorrelationCheck soonTransmission Issues30–120 minutes for initial diagnosisP2851 relates to shift fork position sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.