[Trevor]

Originally Posted by sowise

Unless you gleened more information than the rest of us i.e. the actual fault code then you don't know. He either saw the fault code himself, or was told the fault code by the mechanic who was unable to fix his car. We didn't see what the fault code was. It is no offense to him, but it is why I was asking for more details. IMO not enough information. Besides those checks weren't the end all be all... they were called a good place to start.

In conjunction with others I do know, having gleAned what was originally posted. -----

“A month ago I got CE light on, had it checked and it came up knock sensor and 02 sensor 3 I believe (it's the 02 senor on the exhaust pipe after the engine), both were replaced at the Subaru Dealer. Anyway, after a week CE came back on, I took it back and he cleared the CE a week later it came back. I then left my car with them as I went on a holiday for two weeks with instruction to fix everything they could find wrong. Over $2000.00 later I picked up my car all was perfect...for 9 days and once again CE light same 02 senor. I'm thinking I have a defective 02 sensor,”