20 Most Recent 2001 Volvo S80 - Page 5 Questions & Answers

Take the radio back out and double check your connections. If it is a factory system you may have the connections crossed some Volvo radios come with multiple plug-ins

Replace with genuine unit--reset computer and run fault codes again.

You don't they come on when you spray the windscreen washers while the wipers and lights are turned on.

There is a small plastic rod coming out of the instrument cluster near the clock the same as the one for resetting/toggling the trip computer. Turn and hold it clockwise or counterclockwise, that will adjust the time.

Your transmission can leak while the car is running or while the car is not on.--------------------------------------------------------KTAG K-TAG ECU Programming Tool

I would be thinking Wheel Bearing-possibly

Is the battery good?

Was it working before oil change?Right by the oil filter is the oil pressure switch,it could of been knocked loose when changing oil filter,mine sometimes comes loose when I remove oil filter.It may have a rubber boot cover.

never heard of them no you do not need them