Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, check engine code PO155 in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hello all, I recently had the PO155 come up. Took the car to autozone and it came up as a ...
- 06-25-13 01:44 PM #1Cadillac Owners Fanatic
- Automobile(s): 2007 CTS, 2007 ESV
- Join Date
- Sep 2012
- The city of the 500
check engine code PO155
I recently had the PO155 come up. Took the car to autozone and it came up as a o2 sensor. Looks like there was a history of it 2x.
Can this be a sensors going bad or perhaps another related item. Anyone else have this code come up. If yes did replacing the sensor solve the issue.
Car has been driving fine, cannot tell any differences in performance. So should I change it out to resolve any future issues. Also should I change both banks.
Thanks in advance.