Having problems with your 2004 Chevrolet Impala ?
My 2004 chevy impala has a engine code of PO455 and i changed the gas cap but i keep getting the code back. any thing else i should check?
Sometimes the recirc line fitting can be cracked or worked loose and allow the same pressure loss. On the Impala I am not exactly sure how to get to them.
Repair Help & Product Troubleshooting for 2004 Chevrolet Impala
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.