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OBD Codes

P0521 – Engine Oil Pressure Sensor/Switch Range/Performance | OBDeleven

Does your car show a P0521 fault code? It points to an engine oil pressure sensor issue. Learn what it means and what to check next in this guide.

P0521 – Engine Oil Pressure Sensor/Switch Range/Performance

P0102 – Mass or volume air flow "A" circuit low | OBDeleven

P0102 signals a faulty MAF sensor from airflow, connection, or sensor issues – learn causes and fixes here.

P0102 – Mass or volume air flow "A" circuit low

P0562 – System voltage low | OBDeleven

P0562 means a car has low system voltage, stopping electronics from working properly. Find possible causes, symptoms, and troubleshooting tips here.

P0562 – System voltage low

P0401 – EGR flow insufficient detected | OBDeleven

Fault code P0401 means not enough exhaust is recirculating to the engine – the EGR system may be faulty. Learn how to check, diagnose & fix it here.

P0401 – Exhaust gas recirculation (EGR) flow insufficient detected

P0012 – Intake camshaft timing over-retarded | OBDeleven

A P0012 diagnostic code indicates an intake camshaft timing problem. Here are possible causes, symptoms and troubleshooting tips for P0012.

P0012 – Intake camshaft timing over-retarded (bank 1)

P0335 – Crankshaft position sensor circuit malfunction | OBDeleven

A P0335 diagnostic code indicates a crankshaft position sensor circuit malfunction. Learn possible causes, symptoms and troubleshooting tips for P0335.

P0335 – Crankshaft position sensor "A" circuit malfunction

P0440 – Evaporative emission control system malfunction | OBDeleven

A P0440 diagnostic code indicates the EVAP system malfunction. Learn possible causes, symptoms, and troubleshooting tips for P0440.

P0440 – Evaporative emission control system malfunction

P0135 – Oxygen sensor heater circuit malfunction | OBDeleven

A P0135 diagnostic code indicates a problem with the Oxygen sensor heater circuit. Learn possible causes, symptoms, and troubleshooting tips for P0135.

P0135 – Oxygen sensor heater circuit malfunction (bank 1, sensor 1)

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