GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

never had a problem till now

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Old Aug 8, 2008 | 09:35 AM
  #1  
TEXASMADECHEVY's Avatar
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From: HOUSTON, TX
Default never had a problem till now

well yesterday my truck started giving me problems for the first time since i had it has 44500 miles and this is what happen hopefully someone can tell me whats going on when i was leavin from work turned on the truck and it just started hesatating and then on the dash it said reduced engine power and it add a high idle and when tried to give it gas it wouldnt rev so i turned off the truck and turned it back on after a couple of times it finally started acting right but my check engine light stayed on since it was so late i couldnt take it to the dealer so on the way home i stopped at autozone and they pulled the engine codes and it give six codes p0120 p0220 p1125 p1516 p2120 p2125 can anyone give me more info on whats going on with my truck thanks in advance and if i put this in the wrong section sorry
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Old Aug 8, 2008 | 10:12 AM
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I just looked up all those codes, looks like your TPS sensor is bad, or if you have a DBW throttle body, it could also be bad.

P1125 Accelerator Pedal Position (APP) System
P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position
Performance

the p120 and p220 are both TPS sensor codes
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Old Aug 8, 2008 | 11:17 AM
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Check the wiring and connector to the TPS, I've heard of open circuits there. If the wiring is OK, may be a bad TPS.
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Old Aug 8, 2008 | 11:12 PM
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My wifes 300c did that also. Try your local library. The ones around here have Aldata on the computers and I could print out how to trouble shoot it. It could be TPS, throttle body, wiring cam position sensor or even a few more. Aldata will walk you through the whole thing. It's pretty easy, took me about 45 min on my wifes car. ended up being the cam sensor. $25.00 and about 15 min to change.
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Old Aug 9, 2008 | 12:15 AM
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Originally Posted by sv650lex
My wifes 300c did that also. Try your local library. The ones around here have Aldata on the computers and I could print out how to trouble shoot it. It could be TPS, throttle body, wiring cam position sensor or even a few more. Aldata will walk you through the whole thing. It's pretty easy, took me about 45 min on my wifes car. ended up being the cam sensor. $25.00 and about 15 min to change.
if it was the cam sensor, why would the TPS sensor be throwing codes...
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Old Aug 9, 2008 | 01:34 PM
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Originally Posted by 00ChevyScott
if it was the cam sensor, why would the TPS sensor be throwing codes...
I'm not sure the exact reason but I know the ecm comtrols and reads everything at all times so when one sensor acts up it can cause others to go screwy.

Like I say my wifes car was doing the exact same thing and trouble shooting with Aldata I came up with the cam sensor. That was in March and it hasan't acted up since. I'm not saying yours is the cam sensor just that you shouldn't start throwing parts at it. It can get exspensive.
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