Welcome to the H4O - HUMMER 4x4 Off Road.
Results 1 to 6 of 6
  1. #1
    Bald Tire
    Join Date
    Oct 2019
    Location
    Texas
    Posts
    6
    Thanks
    4
    Thanked 0 Times in 0 Posts

    I got some codes today...

    As my wife was driving to work today in my truck she got a message that said “reduced power” she also said the truck cut off and she started it back up. I had her drive the feeder roads back home so I could take it to get the codes read. Everything I’ve researched has said it’s a TPS issue and I need to replace that. autozone says I need to replace ignition coil in 1st cylinder and that the ignition coil needing to be replaced would give that same message about reduced power. Please let me know what is the best thing to do. I am going on a road trip in two weeks and need to get this fixed ASAP. Thanks!

    Error Codes:
    P0301
    P0014
    P0171
    P0411
    P0068







    Sent from my iPhone using Tapatalk

  2. #2
    Bald Tire
    Join Date
    Feb 2018
    Location
    US
    Posts
    15
    Thanks
    2
    Thanked 1 Time in 1 Post
    You can test the coil to see if it is actually the coil. On my H3T it happened to me and it was the tps. 6-9 months later I had to replace the coils...3, 5, 7 was the order they died in lol.

    Sent from my SM-N960U using Tapatalk

  3. #3
    Bald Tire
    Join Date
    Oct 2019
    Location
    Texas
    Posts
    6
    Thanks
    4
    Thanked 0 Times in 0 Posts
    Where did u get your TPS from? Was it hard to replace?

    I’ve been considering buying off Amazon because they have better prices that Autozone and OReilys.


    Sent from my iPhone using Tapatalk

  4. #4
    Mr. Beretta
    Join Date
    Sep 2011
    Location
    Who cares!
    Posts
    1,949
    Thanks
    8
    Thanked 604 Times in 369 Posts
    It can help to know the engine since H3's had two gasoline engines. Reading the VIN it appears to be the 3.7L (Suggestion it to put your vehicle info in your signature for future reference for any future problems.)

    How did it run after she restarted the engine? If it was running ok, clear all codes drive it around and see if the problem comes back. And if codes come back troubleshoot from first code on to last. Resetting after each code problem is fixed.
    If a 301 comes back, switch coils (put 1 on 2 and 2 on 1) and see if the new code goes with the coil or remains with the cylinder. If it goes with the coil, replace it, if not and remains as 301 it is not the coil. And then troubleshoot from there.
    Also, check to see if there is any corrosion on the number one plug. There was a problem in early H3s with water standing in the first cylinder spark plug hole causing corrosion (going back in time in my memory).

    Don't know anything about Hummers, but I do speak Malamute.

  5. #5
    Bald Tire
    Join Date
    Feb 2018
    Location
    US
    Posts
    15
    Thanks
    2
    Thanked 1 Time in 1 Post
    It was either am auto parts or rock auto, it was cheaper online than any auto parts store around.

    Sent from my SM-N960U using Tapatalk

  6. #6
    All Terrain
    Join Date
    Sep 2011
    Location
    Santa Maria
    Posts
    580
    Thanks
    64
    Thanked 84 Times in 76 Posts
    Quote Originally Posted by H3BigBoy View Post
    Where did u get your TPS from? Was it hard to replace?

    I’ve been considering buying off Amazon because they have better prices that Autozone and OReilys.


    Sent from my iPhone using Tapatalk
    The TPS is integral to the throttle body. If you want to replace the TPS replace the throttle body. There's no trick to it; I replaced mine a couple of years ago after my truck neared 100K miles. I didn't have any other codes or failures that went with the TPS problem though, and replacement took care of the problem I had. Do a search on throttle body and you will see the discussions.


 

Similar Threads

  1. Engine Codes on H3 Hummer
    By Schwarttzy in forum HUMMER H3 2006-2010; H3T 2009-2010
    Replies: 0
    Last Post: 09-21-2015, 09:33 PM
  2. This weekend's H3 trouble codes
    By Humvdood in forum HUMMER H3 2006-2010; H3T 2009-2010
    Replies: 0
    Last Post: 02-16-2015, 03:10 PM
  3. Tcc codes and remote start
    By kingamra in forum HUMMER H2 2003-2009
    Replies: 7
    Last Post: 02-03-2015, 11:28 PM
  4. O2 sensor & Misfire codes
    By JJT in forum HUMMER H3 2006-2010; H3T 2009-2010
    Replies: 2
    Last Post: 06-27-2014, 01:09 AM

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
  •  
Logout