I my envoy will go into engine power down mode while I am driving.
What is your question?
It's been taken to 3 gm dealers and each time they do something they say they have fixed it. This last time the dealership said they could not duplicate the problem so I should bring it back when it does it again, the funny thing is that I took it in there doing. If you turn the car off long enough it will and restart sometimes its okay other times it start in engine down mode. The diagnostic code is P2138 and they have replaced the throttle body but it continue to do it. It started the first time 11-22-14, at that time the dealership said I had 6 broken wires and they repaired those wires, then 12-11-14 it did again and the dealership said it was a bad throttle body. On 1-6-15 it happened again and the dealership cannot duplicate the problem and doesn't want me to waste my money replacing thing so they suggest I pick it and bring back in when it does it again. Each It has been taken in in engine power down mode. I feel that I am getting treated poorly by these dealers and all the dealers have been different because when it happens I take it to the nearest Gm dealer.
RepairPal Certified shops can diagnose and repair your 2008 GMC Envoy. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Have they tested the Throttle Pedal Position Sensor?? ... Since this code (P2138) is indicative of a problem WITH the TPPS, I would assume it's been tested.... I guess you do not know by not replying here!!.. Maybe you need to stop thinking the Dealer is the only place that can FIX this!!!
Hi: I have had the same problem several times - We had the throttle body changed out twice, sensors changed,wiring parts etc and it still goes into limp mode. I have had it to several repair shops with no luck. I can smell unburnt fuel so I tried a higher octane fuel and it has been good for the last 2 fill ups.(touch wood)
I have an 04 with the same issue. Was told the same thing. Throttle body and or tps. Neither fixed it. Turned out to be the MAP sensor. It has went out twice, both with different codes. $40 or so at pep boys with a lifetime warranty. Good luck!
