Although, the guys on the surburban forum were not very helpful, when I asked a question about a corvette. 
Accelerator Pedal Position (APP) System code P1125
1st Gear
Joined: Oct 2009
Posts: 1
Likes: 0
i have the same problem with my brother in laws 99 vette
will sit there and run but no response from the throttle
have the code for the app
also reading on your posts earlier i have a good idea what the problem is thanks
will sit there and run but no response from the throttle
have the code for the app
also reading on your posts earlier i have a good idea what the problem is thanks
Vettaholic
Joined: Jun 2006
Posts: 183
Likes: 0
From: Wherever I drive my vette
Thanks for the info - you see, your late post was useful after all !! 
I'm blattling with similar issues, except that in my case, I also ran a parallel harness that doesnt seem to do the trick
I'm stumped
The last thing I can do is to swap out the accelerator pedal and see what happens - i've replaced everything else but the PCM (TAC, harness, TB) still no progress
I'm blattling with similar issues, except that in my case, I also ran a parallel harness that doesnt seem to do the trick
I'm stumped
The last thing I can do is to swap out the accelerator pedal and see what happens - i've replaced everything else but the PCM (TAC, harness, TB) still no progress
1st Gear
Joined: Dec 2010
Posts: 1
Likes: 0
help
hope i dont offend any corvette people on here by posting about a suburban, but its a chevy, and chevys need to stick together
I am having the same problem with my suburban and it seems to not be just corvettes or suburbans, it seems to be any chevy with electronic throttle control. I too have replaced the throttle body and the app sensor at the pedal and had the dealer replace the harness from the pedal sensor to the TAC module. I havent had it go into reduced engine power since then but have only driven 20 miles or so, and in those miles it feels like it wants to go into reduced power mode in between 1500 to 2000 rpm right before or after shifting. and occasionally in park the idle sits at 1052 im loosing all hope, I think i might have to replace the TAC module next but damn the money!!!
I am having the same problem with my suburban and it seems to not be just corvettes or suburbans, it seems to be any chevy with electronic throttle control. I too have replaced the throttle body and the app sensor at the pedal and had the dealer replace the harness from the pedal sensor to the TAC module. I havent had it go into reduced engine power since then but have only driven 20 miles or so, and in those miles it feels like it wants to go into reduced power mode in between 1500 to 2000 rpm right before or after shifting. and occasionally in park the idle sits at 1052 im loosing all hope, I think i might have to replace the TAC module next but damn the money!!!
Tech Contributor
Joined: Jan 2007
Posts: 19,456
Likes: 1,165
From: Dyer, IN
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
GM has **** POOR female connector pin reliability. It will behoove you to disconnect EACH connector and carefully check EACH female pin to make sure the FEMALE pins are NOT spread apart and male POOR electrical connections.
BC
BC
Racer
Joined: Mar 2005
Posts: 262
Likes: 3
From: Tempe AZ
I agree with Bill on the connectors. I had the problem before - replaced the pedal and it came back 7 months later. Then I replaced the TAC because early ones apparently have been known to throw the codes too. The problem cam back in about 7 months again.
I finally replaced the connector on the TAC. Problem solved. EFI Connections has the proper connectors with the proper wire color coding. I soldered the new connector in. about $15 to fix. Replacing the TAC probable helped the connector to re-seat. then eventually the corrosion or whatever set in again.
Look where these things are (under the battery) and you can see why a lot of this weird stuff happens.
The reason looked at the connectors is that while researching the problem, it seems that the pedals and TAC rarely go out. The local dealer never has a call for them.
Jon
I finally replaced the connector on the TAC. Problem solved. EFI Connections has the proper connectors with the proper wire color coding. I soldered the new connector in. about $15 to fix. Replacing the TAC probable helped the connector to re-seat. then eventually the corrosion or whatever set in again.
Look where these things are (under the battery) and you can see why a lot of this weird stuff happens.
The reason looked at the connectors is that while researching the problem, it seems that the pedals and TAC rarely go out. The local dealer never has a call for them.
Jon
3rd Gear
Joined: Jan 2023
Posts: 3
Likes: 0
Solition somewhat
I bought a 2003 corvette base no z06(sadly) about two months ago. Then I had the dreaded p1125 code come up. I prefer to work on my own cars, so after some research I ordered the rpi designs accel pedal position sensor however after install I could rev past 1500 rpm without the car going into limp mode. I had some things to take care of and needed the car, so I drove it to the shop in limp mode, but here’s what’s interesting after driving about 2 miles in limp mode the cars throttle response was better and it took higher paced acceleration to put it in limp mode to be safe I let the shop see it, they did a fil relearn on the ecu and it threw the code about two times after that( I cleared it both times and moved on to see if it would self learn) I’ve driven it 100 miles since then and the pedal and acceleration gets better each time without it going into limp I suspect these systems may have a long calibration process and it just takes a lot of trial and error to get it to calibrate. I have 160 miles to drive this weekend I’ll keep y’all updated. If anything changes.
sorry for the long post just trying to share my input
sorry for the long post just trying to share my input
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