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03 Silverado with 5.3, just replaced the tranny and got the following codes. P0120 Throttle pedal Switch A ; P0220 Throttle Pedal Switch B; P1516 Tac Module ; P2135 Throttle pedal position Sensor switch a/B correlation. I replaced the throttle body position sensor-complete with new butterfly valve, an new gas pedal sensor-complete with pedal. Do I need to have the computer relearn these parts somehow? IDK! And it is still bogging down but im not getting the codes again though. Is the replacement of the 8 pin connection to the throttle body sensor next? or am I missing something The truck moves off and shifts fine, but all of a sudden it goes into intermittent limp home mode type of running. Then it will run fine for a few minutes and then bog down again.
okay so here goes: 2005 silverado 1500 hd, 6.0 135k. Codes p2135 throttle pedal position sensor switch a/b voltage corelation, p0300 random multiple cylinder missfire detected, p0120 throttle pedal position/switch a circut. I have been fighting this isuue for the last two years and it is getting to the point I am ready to sell. I hate to do that as the truck is in overall great shape, well maintained with no other mechanical issues. As I said this issue has been going on for at least two years with some limited success for intermittent times at a resolution. I have replaced at different times all of the following all with oem ac delco parts. some of these were done due to other codes etc. throttle body, pedal postion assembly, wiring harness to the throttle body with new wires allmost going to the ecm ( did strip the old harness/plug and did come across a bad wire), the ecm, fuel injectors, cats, all 4 o2 sensors, map, mass air flow, knock seensors, plugs wires , intake gaskets, fuel pump and fill sensor, alternator, battery, I have also ran a new wire for the two grounds at the back of the block direct to ground. Currently after the ecm was replaced last, about 3 weeks ago, i have been getting this problem only upon start up at different times, hot or cold about 12 times a week. It always resets after I shut it down and wait a minute or two and I haven't had to erase the code to get it to go away. My next step short of selling the truck would be to replace the whole engine harness as I feel this must be a wire problem and trying to find that might take longer than a new harness install. I am in the Chicago area and If anyone has a reputable shop that has dealt with something like this I''d be interested in there name. Ant other reccommendations would be greatly appreciated. thank you
Hello On the coldest of day happening quite often I'm getting code p2135 throttle body sensor Also the truck goes into reduced power mode and service traction control comes on I've checked all the wire to the throttle body Cleaned throttle body Checked battery terminal Can't figure this one out...it only happens on cold cold mornings Also if I'm driving and my windows are all up and I try to raise 2 or more up at the same time the service traction control display comes up?related? Any help would be greatly appreciated Thanks 2009 gmc sierra 2500hd sle