QuestionMy 92 Previa 2wd just failed the CO part of the inspection test. What should be replaced? The van has 190,000 miles.
AnswerHigh CO means that the air/fuel mixture is too rich, too much fuel/not enough air, there could be many causes for this ranging from a simple solution like a clogged air filter, a leaking fuel injector, a leaking cold start injector, a bad O2 sensor, by the way is the check engine light on?
