We have a 2005 Saturn Ion 3 with about 130,000 KM (81,250 miles). The vehicle has the 2.2 echo tech engine with automatic transmission. Late last year when the service engine warning light came on the vehicle was stalling and when we tried to get the OBD II diagnostic tool to determine the code it showed no codes. The car was then seen by a mechanic and he could not get his diagnostic tool to determine the codes. He thought that it probably required a new valve job. We then insisted that he investigated further into the problem then he suggested it was caused by a faulty engine coil. Then, he replaced it with a used one he had in storage. It worked; however, he could not provide us with an explanation why the vehicle is not showing the codes when the diagnostic tool is used. Now the car is working well but the service engine warning light is on again and we cannot determine the codes when we use the diagnostic tool. We would appreciate very much if someone could advice us what the solution to this problem is. Thank you.
Tuesday, August 14th, 2012 AT 9:55 PM