The only code its reading is for the upstream o2sensor....
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2007 Chevrolet Impala Question: My trans is in limp mode what sensor can make that happen.....?
Answer #1milesauto from Miles Auto Service Inc., October 11, 2013, 09:17Master
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..