check engine light is on constantly
I have a PO421 code,should I change the lower oxygen sensor?
to answer a question
3 Answers from these members:
Providing a complete model number to your question will definitely help an expert better your search. If you would like to reply to this thread with a complete model number included I would be more than happy to assist you. Have a great day.
by afritz afritz
Answered in 8 minutes
Didn't find what you are looking for?
Get up to