OBD2 Codes

Learn what the P0113 code means, common intake air temperature sensor causes, symptoms, diagnostic steps, repair costs, and whether it is safe to drive.

Learn what the P0301 code means, common cylinder 1 misfire causes, symptoms, diagnostic steps, repair costs, and when driving can damage the catalytic converter.

Learn what the P0101 code means, common MAF sensor and intake leak causes, symptoms, diagnostic steps, repair costs, and whether it is safe to drive.

Learn what the P0455 code means, common EVAP large leak causes, symptoms, diagnostic steps, repair costs, and when a gas cap is enough.

Learn what the P0128 code means, common thermostat and coolant temperature causes, symptoms, diagnostic steps, repair costs, and whether it is safe to drive.

Learn what the P0135 code means, common oxygen sensor heater circuit causes, symptoms, diagnostic steps, repair costs, and whether it is safe to drive.

Learn what the P0442 code means, common EVAP small leak causes, symptoms, diagnostic steps, repair costs, and when a gas cap may fix it.

Learn what the P0171 code means, common lean-condition causes, symptoms, diagnostic steps, repair costs, and why replacing the O2 sensor first is often a mistake.

Learn what the P0300 code means, common random misfire causes, symptoms, diagnostic steps, repair costs, and when driving can damage the catalytic converter.

Learn what the P0420 code means, common causes, symptoms, diagnostic steps, repair costs, and why you should not replace the catalytic converter first.