Check Engine Code Guides
What the code means, what it should cost to fix, and the misdiagnosis to watch for.
P0420Catalyst System Efficiency Below Threshold (Bank 1)P0300Random/Multiple Cylinder Misfire DetectedP0171System Too Lean (Bank 1)P0455Evaporative Emission System Leak Detected (Large Leak)P0442Evaporative Emission System Leak Detected (Small Leak)P0128Coolant Thermostat Below Regulating TemperatureP0301Cylinder 1 Misfire DetectedP0430Catalyst System Efficiency Below Threshold (Bank 2)P0401Exhaust Gas Recirculation Flow InsufficientP0011Camshaft Position Timing Over-Advanced (Bank 1)P0113Intake Air Temperature Sensor Circuit HighP0507Idle Air Control System RPM Higher Than ExpectedP0700Transmission Control System MalfunctionP0740Torque Converter Clutch Circuit MalfunctionP0135O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)P0562System Voltage LowP0520Engine Oil Pressure Sensor Circuit MalfunctionP0606PCM/ECM Processor Fault
🟢 drive normally · 🟡 fix soon · 🔴 limit driving
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