: Code PA200?

02-12-11, 04:19 PM
My warranty ran out last week. As soon as it did, my check engine light came on. I brought it to the dealership and they told me it showed a code that the O2 sensor on Bank 1 needed to be changed. I brought it in and $358 later it was changed "as I was told". The very next day the check engine light came on again.
My buddy just happens to have his own code reader. He just hooked it up to my 2006 Cadillac DTS 4.6L and it read code: PA200, which showed O2S. He told me alot of times some mechanics will just clear the code to give them some time or if they don't feel like diong the work.
Can someone please let me know if this code that my buddy pulled up is the same O2 sensor that should've been changed initially? And if it is, how could this happen other than the new O2 sensor being defective? Thanks

03-11-12, 12:15 PM
Same thing happened to me but I have the old sensor so I don;t know if its a defective new sensor or an exhaust leak causing the code