CEL's are very important but however more often than ever the inexperienced tend to use CEL's as the absolute reason something is wrong. just because they get a O2 sensor code they assume the O2 sensor is faulty and blow $50+ on a new one only to see the problem persist.
People really need to learn how to diagnose their problems. CEL's are tools to HELP diagnose not to dictate absolute verdicts.
People really need to learn how to diagnose their problems. CEL's are tools to HELP diagnose not to dictate absolute verdicts.