OBD2 code lookup
Your mechanic or a free scanner at AutoZone gives you a code like P0420. Here's what it actually means — in plain English.
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P0011P0011 Code: Camshaft Position Timing Over-Advanced or System Performance (Bank 1)
moderateP0128P0128 Code: Coolant Temperature Below Thermostat Regulating Temperature
lowP0171P0171 Code: System Too Lean (Bank 1)
moderateP0174P0174 Code: System Too Lean (Bank 2)
moderateP0300P0300 Code: Random Multiple Cylinder Misfire Detected
moderateP0301P0301 Code: Cylinder 1 Misfire Detected
moderateP0303P0303 Code: Cylinder 3 Misfire Detected
moderateP0420P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1)
lowP0440P0440 Code: Evaporative Emission Control System Malfunction
lowP0442P0442 Code: Evaporative Emission System Leak Detected (Small Leak)
lowP0455P0455 Code: Evaporative Emission System Leak Detected (Large Leak)
lowP0700P0700 Code: Transmission Control System Malfunction
highDon't drive