OBD-II fault codes library
What each code means, the most common symptoms and causes, and the first practical test to run — written for mechanics.
Powertrain (P)
- P0011Camshaft Position Timing Over-Advanced (Bank 1)
- P0016Crankshaft/Camshaft Position Correlation (Bank 1 Sensor A)
- P0087Fuel Rail/System Pressure Too Low
- P0128Coolant Thermostat Below Regulating Temperature
- P0171System Too Lean (Bank 1)
- P0172System Too Rich (Bank 1)
- P0234Turbocharger Overboost Condition
- P0299Turbocharger/Supercharger A Underboost
- P0300Random/Multiple Cylinder Misfire Detected
- P0335Crankshaft Position Sensor A Circuit
- P0340Camshaft Position Sensor A Circuit
- P0401Exhaust Gas Recirculation Flow Insufficient
- P0402Exhaust Gas Recirculation Flow Excessive
- P0420Catalyst System Efficiency Below Threshold (Bank 1)
- P0442Evaporative Emission System Leak Detected (Small Leak)
- P0562System Voltage Low
- P0700Transmission Control System Malfunction
- P2002Diesel Particulate Filter Efficiency Below Threshold (Bank 1)