Hello. After I drive my car for a long trip (80+ miles), the check engine light will come on with a code of 1221 (oxygen sensor) when the car is at idle, such as at a stop light. Once I start moving again, the check engine light goes away. I have a new water temp sensor, oxygen sensor, MAF and vacuum hoses. Why is this happening only at idle after long trips? Does not happen in city driving.
May 14, 2010 at 11:53 AM
