The only code its reading is for the upstream o2sensor....
Chevrolet Q&AAsk Your Question
2007 Chevrolet Impala Question: My trans is in limp mode what sensor can make that happen.....?
Perhaps you need a differant scanner to get the transmission fault codes. Not likely that a o2 sensor would put transmission in a limp mode.
Replyscottjohn51, October 12, 2013, 14:14Rookie
what will make that happen... Cause da check engine light is off now and no codes r showing..