Since 2005 I have had continuing problems with check engine light. Code PO 420 is the consistant computer code. I have been taking the car to the dealer. My catalytic converter has been replaced four times so far. My oxygen sensors have been replaced twice.
Most of the time when this problem occurs the weather is around 40 degrees and it is humid. Then my car stalls out, bucks and won't accelerate. But sometimes the check engine light comes on without any noticeable poor performance. I think the symptom is being treated, but not the cause. What could be the cause?
Most of the time when this problem occurs the weather is around 40 degrees and it is humid. Then my car stalls out, bucks and won't accelerate. But sometimes the check engine light comes on without any noticeable poor performance. I think the symptom is being treated, but not the cause. What could be the cause?
Mar 26, 2009 at 11:41 AM
