I have a 2004 GMC Yukon Denali Xl, and pulled service codes p154 and p155. The description was Bank 2 Sensor 1. I changed both(upstream) and cleared the codes. I then went for a drive, and at about the 24 mile mark. The check engine light came on again. When I checked. The same codes came up. What did I do wrong?
have the same problem?
Friday, November 19th, 2010 AT 11:16 PM