12th Dec 2012, 09:14
I had the same problem with my Montana. What gas brand are you using? I noticed anytime I fueled up with Co-OP or a lesser grade, the engine light came on. When fuelling with Esso, Petro-Canada or Shell, I never had the problem. Seems kind of idiotic, but that's all it took. Better than paying the dealership $500.00 to "fix" it.
14th Jul 2015, 14:47
My Pontiac 2008 has had many issues with the engine light. It had the oxygen sensors both changed twice. Then it started to state that there was too much fuel. So the fuel pump was changed twice. Now the engine light comes on for a day or two and disappears. I don't get it into the dealer fast enough before the light goes out.
1st Dec 2012, 15:37
Had the same problem. Went on for 1 year. Each time the dealer replaced the oxygen senor. But there are two sensors. At last they replaced both at the same time, and the problem has not reoccurred.