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RevGTO
May 29th, 2007, 03:41 PM
When I had a bad cat replaced under warranty some weeks ago, the service manager said that the same side 02 sensor was bad. I told him I would replace it myself. However, I've never had any DTC's and my H02SV readings are pretty close side to side. He may have been referring to the secondary sensor, but are there any PIDs I should log besides H02SV to determine if my primary sensor is indeed working properly?