How to get a check engine light on for Volvo S80 for piston misfiring?
We just bought a used 2004 Volvo S-80 last week. With a check engine light on, we had our friend use his machine to plug into the car to check the problem. Two of the piston are misfiring, and he accidentally took away the check engine light. I dont want
Although it's unusual for someone to "want" the check engine light on, you need to do a drive cycle to get the computer into the "ready" mode. Click the link for instructions on how to do a drive cycle.
http://ratstangrestoration.com/drive-cyc