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 P · Powertrain 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 121–144 of 1049

Most searched first

P0347Camshaft Position Sensor A Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0347 relates to camshaft position sensor a circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0348Camshaft Position Sensor A Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0348 relates to camshaft position sensor a circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0349Camshaft Position Sensor A Circuit Intermittent Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP0349 relates to camshaft position sensor a circuit intermittent bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P034ACrankshaft Position Sensor - Crankshaft Start Position IncorrectCheck soonEngine Problems30–120 minutes for initial diagnosisP034A relates to crankshaft position sensor - crankshaft start position incorrect. Check the fault conditions and vehicle-specific procedure before replacing parts.P034BCrankshaft Position Sensor - Crankshaft Direction IncorrectCheck soonEngine Problems30–120 minutes for initial diagnosisP034B relates to crankshaft position sensor - crankshaft direction incorrect. Check the fault conditions and vehicle-specific procedure before replacing parts.P0365Camshaft Position Sensor B Circuit Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP0365 relates to camshaft position sensor b circuit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0366Camshaft Position Sensor B Circuit Range/Performance Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP0366 relates to camshaft position sensor b circuit range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0367Camshaft Position Sensor B Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP0367 relates to camshaft position sensor b circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0368Camshaft Position Sensor B Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP0368 relates to camshaft position sensor b circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0369Camshaft Position Sensor B Circuit Intermittent Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP0369 relates to camshaft position sensor b circuit intermittent bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0370Timing Reference High Resolution Signal ACheck soonEngine Problems30–120 minutes for initial diagnosisP0370 relates to timing reference high resolution signal a. Check the fault conditions and vehicle-specific procedure before replacing parts.P0371Timing Reference High Resolution Signal A Too Many PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0371 relates to timing reference high resolution signal a too many pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0372Timing Reference High Resolution Signal A Too Few PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0372 relates to timing reference high resolution signal a too few pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0373Timing Reference High Resolution Signal A Intermittent/Erratic PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0373 relates to timing reference high resolution signal a intermittent/erratic pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0374Timing Reference High Resolution Signal A No PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0374 relates to timing reference high resolution signal a no pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0375Timing Reference High Resolution Signal BCheck soonEngine Problems30–120 minutes for initial diagnosisP0375 relates to timing reference high resolution signal b. Check the fault conditions and vehicle-specific procedure before replacing parts.P0376Timing Reference High Resolution Signal B Too Many PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0376 relates to timing reference high resolution signal b too many pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0377Timing Reference High Resolution Signal B Too Few PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0377 relates to timing reference high resolution signal b too few pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0378Timing Reference High Resolution Signal B Intermittent/Erratic PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0378 relates to timing reference high resolution signal b intermittent/erratic pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P0379Timing Reference High Resolution Signal B No PulsesCheck soonEngine Problems30–120 minutes for initial diagnosisP0379 relates to timing reference high resolution signal b no pulses. Check the fault conditions and vehicle-specific procedure before replacing parts.P037CCold Start Camshaft Profile System PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP037C relates to cold start camshaft profile system performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0385Crankshaft Position Sensor B CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP0385 relates to crankshaft position sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0386Crankshaft Position Sensor B Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0386 relates to crankshaft position sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0387Crankshaft Position Sensor B Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP0387 relates to crankshaft position sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.