- Recently Visited
exvolvoguy
03/18/2008, 7:51AM
About: 2002 Volvo S40 1.9T
2000 S40 Check engine light
I recently replaced the oxygen sensors in my s40 but, the check engine light is still on. I took it to Autozone to have them reset the light, but they said that was illegal and refused to do it. They did tell me that the light would go out after about three days when the computer had run through its diagnostics. Is that a true statement?
casper271
03/18/2008, 11:45AM
Sometimes, unless there is an other issue. You might want to get your mechanic to scan the car.
littlehorn
03/19/2008, 10:31AM
The readiness monitors will reset themselves after 10-15 good trips, meaning no error detected, or 150 miles. This is possibly a true statement but time will tell. Give it a few days.

