OBD2 Fault Code Library

Free lookup for thousands of OBD2 trouble codes: filter by family, read short meanings, and open deeper articles. Desktop ELM327 scanner with live data and AI guidance.

OBD2 symptoms

Look up diagnostic trouble codes by what the car is doing: misfire, overheating, rough idle, a check engine light, and other common symptoms.

• Engine misfire
• Engine overheating
• Rough idle
• Check engine light
• Poor fuel economy
• Hard starting
• Engine stalling
• Catalytic converter efficiency
• Oxygen sensor fault
• EVAP leak
• Thermostat not reaching temperature
• Lean air-fuel mixture
• Rich air-fuel mixture
• EGR flow fault
• Engine knock
• Charging system
• Throttle position
• Mass airflow sensor
• Turbo underboost
• Coolant temperature sensor
• Transmission fault

• P1345 — Injector Circuit / IDM Codes Detected (P1345): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by faulty fuel pressure regulator, clogged or leaking fuel injectors, contaminated or incorrect fuel.
• P1346 — Injector Circuit / IDM Codes Not Updated (P1346): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by weak fuel pump or clogged fuel filter, clogged or leaking fuel injectors, faulty fuel rail pressure sensor or wiring.
• P1347 — Crank / Cam Sensor Range / Performance (P1347): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by blown fuse feeding the circuit, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.
• P1348 — Camshaft Position Sensor B Circuit Malfunction (P1348): a powertrain (engine/transmission) fault affecting the camshaft position and variable valve timing. Short, gentle driving to a shop is usually possible. Most often caused by low or dirty engine oil affecting VVT, worn cam phaser, faulty camshaft position sensor.
• P1349 — Camshaft Position Sensor B Range / Performance (P1349): a powertrain (engine/transmission) fault affecting the camshaft position and variable valve timing. Short, gentle driving to a shop is usually possible. Most often caused by damaged sensor wiring or reluctor ring, worn timing chain/belt or jumped timing, stuck or clogged VVT oil control valve (OCV).
• P1350 — OBD2 code P1350 flags a problem with the camshaft position and variable valve timing (SGC (cam position) sensor circuit malfunction/ crankshaft position - camshaft position correlation). Short, gentle driving to a shop is usually possible. Common culprits: stuck or clogged VVT oil control valve (OCV), faulty camshaft position sensor, low or dirty engine oil affecting VVT.
• P1351 — OBD2 code P1351 flags a problem with the fuel delivery and mixture control (fuel level sensor b circuit malfunction). Short, gentle driving to a shop is usually possible. Common culprits: contaminated or incorrect fuel, vacuum or intake leaks skewing the mixture, clogged or leaking fuel injectors.
• P1354 — Fuel Level Sensor B Circuit High (P1354): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by clogged or leaking fuel injectors, faulty fuel rail pressure sensor or wiring, weak fuel pump or clogged fuel filter.
• P1355 — Fuel Level Sensor B Intermittent/Bypass Line Monitor (P1355): a powertrain (engine/transmission) fault affecting the fuel delivery and mixture control. Short, gentle driving to a shop is usually possible. Most often caused by contaminated or incorrect fuel, weak fuel pump or clogged fuel filter, faulty fuel pressure regulator.
• P1356 — P1356 — Ignition Curve Engine-Off Signal Conflict. P1356 records contradictory ignition and engine-state signals, so the fault may be intermittent.
• P1357 — P1357 — EL Module Self-Diagnosis Signal Amplitude Fault. P1357 may be intermittent and can accompany unstable running or stalling.
• P1358 — P1358 — Ignition Monitor Self-Test Signal Range Fault. P1358 can accompany misfires, hesitation, or stalling.
• P1359 — P1359 — Ignition Advance Circuit Failure. P1359 can permit continued operation, but hesitation, misfire, stalling, or inaccurate ignition advance may damage components or create a safety risk.
• P1360 — OBD2 code P1360 flags a problem with the ignition system (IDM input circuit malfunction/ ignition coil control circuit high voltage). Short, gentle driving to a shop is usually possible. Common culprits: moisture or oil in the spark plug wells, worn spark plugs or wrong plug gap, damaged coil wiring or connector.
• P1361 — OBD2 code P1361 flags a problem with the ignition system (ignition coil a primary circuit malfunction). Short, gentle driving to a shop is usually possible. Common culprits: worn spark plugs or wrong plug gap, damaged coil wiring or connector, faulty ignition control circuit in the ECM.
• P1362 — P1362 — Ignition Coil B Primary Circuit Malfunction. A fault in the ignition system. Short, gentle driving to a shop is usually possible. Typical causes: worn spark plugs or wrong plug gap, failed ignition coil or coil pack, damaged coil wiring or connector.
• P1363 — OBD2 code P1363 flags a problem with the ignition system (ignition coil c primary circuit malfunction). Short, gentle driving to a shop is usually possible. Common culprits: faulty ignition control circuit in the ECM, worn spark plugs or wrong plug gap, damaged coil wiring or connector.
• P1364 — Ignition Coil D Primary Circuit Malfunction (P1364): a powertrain (engine/transmission) fault affecting the ignition system. Short, gentle driving to a shop is usually possible. Most often caused by faulty ignition control circuit in the ECM, failed ignition coil or coil pack, worn spark plugs or wrong plug gap.
• P1365 — P1365 — Ignition Coil A Secondary Circuit Malfunction. A fault in the ignition system. Short, gentle driving to a shop is usually possible. Typical causes: faulty ignition control circuit in the ECM, failed ignition coil or coil pack, damaged coil wiring or connector.
• P1366 — OBD2 code P1366 flags a problem with the ignition system (ignition control (IC) circuit low voltage). Short, gentle driving to a shop is usually possible. Common culprits: moisture or oil in the spark plug wells, damaged coil wiring or connector, worn spark plugs or wrong plug gap.
• P1367 — Ignition Coil C Secondary Circuit Malfunction (P1367): a powertrain (engine/transmission) fault affecting the ignition system. Short, gentle driving to a shop is usually possible. Most often caused by failed ignition coil or coil pack, damaged coil wiring or connector, faulty ignition control circuit in the ECM.
• P1368 — OBD2 code P1368 flags a problem with the ignition system (ignition coil d secondary circuit malfunction). Short, gentle driving to a shop is usually possible. Common culprits: failed ignition coil or coil pack, worn spark plugs or wrong plug gap, faulty ignition control circuit in the ECM.
• P1370 — Ignition Coil Secondary Circuit Failure (P1370): a powertrain (engine/transmission) fault affecting the ignition system. Short, gentle driving to a shop is usually possible. Most often caused by faulty ignition control circuit in the ECM, damaged coil wiring or connector, failed ignition coil or coil pack.
• P1371 — Ignition Spare (P1371): a powertrain (engine/transmission) fault affecting the ignition system. Short, gentle driving to a shop is usually possible. Most often caused by worn spark plugs or wrong plug gap, damaged coil wiring or connector, failed ignition coil or coil pack.