I understand that it can have an effect on mileage, but by how much ???? they were off by 8 psi.

You can't swap the sensors on a D2, cause the wiring harness for the rear ones are too short to plug in the front.

 

dang. Just a thought.

It does make sense that you wouldn't get a good bump because your sensors weren't up there on mileage yet..

Don't know what to tell you.

 

For everybody's info, the dealer new what to do. They had to what they called 'reset the adaptations' on the ECU. Took some 15 minutes overall and I wasn't charged for this.

They explained that although I erased the codes with my OBD2 reader, they still had to do a system reset in order for the ECU to get off the 'damaged O2 sensor' mode which causes the vehicle to run full rich and get on the 'fixed problem normal operation' mode to allow the fuel ratio to go back to normal.

Thanks for all of you who gave a shot to my problem. Hopefully, this diagnostic will help others in the futur.

Darover