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Once again during a cruise yesterday after my car warmed up,
got a Check Engine light. Engine ran rough, and eventually went into
Limp Home mode, revving at around 2200 rpm.
Got home and shut the car down. After a few minutes restarted the engine and it was fine for a while, then Check Engine light again.
Hey Peter how you doing?
What have you relaced so far....what codes are you getting....sounds like a senser is failing with heat and throwing you into limp home, O2 maybe?
Peter the O2 sensor is (screwed?) into the exhaust pipe just past the cat if I remember correctly with one wire going to it, and yes you can change that out yourself. Get the GM replacement not a cheap sub.