Thread: Check Engine light codes: P1125, 2120. 2125 and 2138 - Reduced Engine Power issues

Results 1 to 2 of 2
  1. #1 Check Engine light codes: P1125, 2120. 2125 and 2138 - Reduced Engine Power issues 
    SE Level Member
    Join Date
    Dec 2020
    Location
    Colorado
    Posts
    1
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Hello Everyone, I am new here.

    I want to try and help someone with my past experience with my Check Engine light. I have a 2004 Pontiac Grand Prix, GT2 and I kept getting a reduced engine power, which is incredibly annoying and dangerous. I had the above codes, which kept pointing to the accelerator pedal sensor assembly. i went to NAPA auto parts and brought a new accelerator pedal assembly and installed it. The check engine light went out, but came back on the next day with the same codes. What I found out was, that this assembly is VIN specific to each car. The assembly has to be a factory AC Delco and be the one for your car. I got the assembly from the Chevrolet dealer and installed it. (take 5 minutes - two bolts) The check engine light went off on its own, and has never come back on. I wish I would have known this before I got it diagnosed for $100 and bought the assembly from NAPA auto parts for $104, which I could not return and then had to buy the AC Delco unit for $135.


    I also replaced the throttle body assembly, before I replaced the accelerator pedal sensor assembly for $250. Try the AC Delco accelerator pedal assembly first and see what happens.

    I hope this helps someone.
    Reply With Quote  
     

  2. #2 Re: Check Engine light codes: P1125, 2120. 2125 and 2138 - Reduced Engine Power issue 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
    Join Date
    Sep 2009
    Location
    Rogers, MN
    Posts
    21,022
    Thanks (Received)
    21
    Likes (Received)
    45
    Dislikes (Received)
    0
    Anything APP or throttle related I always get OEM. The aftermarket is good for a lot of things but just not important sensors/parts.

    SMGPFC Member #1
    Reply With Quote  
     

Similar Threads

  1. Reduced engine power 2 codes
    By davidadams in forum 04+ Specifics
    Replies: 24
    Last Post: 02-16-2014, 08:13 PM
  2. Reduced engine power light!!
    By jucal in forum Engine
    Replies: 10
    Last Post: 08-24-2012, 12:00 AM
  3. reduced engine power light - no response
    By 04GT in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 22
    Last Post: 06-08-2012, 08:05 AM
  4. Reduced engine power light.
    By joeltonya in forum General Tech Discussion
    Replies: 4
    Last Post: 03-04-2012, 09:05 AM
  5. Check Engine light came on today with 4 codes.
    By johnnyb in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 18
    Last Post: 08-29-2011, 12:12 AM
Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •