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Misfire

An intermittent or continuous failure to ignite the air/fuel mixture in one or more cylinders.

P0420 and P0421: Catalyst Trouble Codes

P0420 and P0421: Catalyst Trouble Codes

These trouble codes are both signs of catalyst efficiency problems. Learn what can cause these codes, and what to do about them.

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P0335: Crankshaft Position Sensor A Circuit Malfunction

P0335: Crankshaft Position Sensor A Circuit Malfunction

Reading P0335 on your scan tool? Learn some common causes and solutions for this issue.

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P0300: Random Misfire Detected

P0300: Random Misfire Detected

Seeing P0300 on your code reader? Learn some common causes and solutions.

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P0420: Catalyst System Efficiency Below Threshold

P0420: Catalyst System Efficiency Below Threshold

Seeing P0420 on your code reader? Learn some common causes and solutions for this issue.

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