Jump to content

Are codes for last known problems stored?

KKev1701

By KKev1701
in Ask A GM Technician

Recommended Posts

KKev1701 New Member

KKev1701

Posted
Posted

2005 GMC Sierra extended cab, 2WD

 

My problem is random at best. Its the age old service airbag indicator however there is no rhyme or reason to it. The only predictable trigger as of late has been cold? I use to be able to clear it (if and or when it popped up) by a simple shut off and restart.. It wouldnt come back then. The past two times, that it has been cold (weather wise) if I shut the truck off and restart, it wont clear. HOWEVER if the truck has been running and things warm up, it will then clear if I shut it off and restart. YES this is how random it is. Another tidbit of information is that it wont clear in the middle of a drive or anything. Ive read about that happening where it would clear on its own. I usually have to initiate it by shutting the truck off.

 

SO due to the randomness of it, does the light have to be on in order to pull a code? I cant imagine trying to run somewhere and get someone to pull a code, whenever it MAY happen. If I go somewhere, and have to wait and shut the truck off, and it clears, then its pointless..

 

Thanks!

93gmc$$ Enthusiast

93gmc$$

Posted
Posted

Codes should save for 10 ignition cycles with an H (history) suffix. Even with that said, I try to pull codes with the engine/ign still on after a SES/CE lite if possible--seems to be more reliable.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • richard wysong
      Gas Prices

      By richard wysong · Posted

      Diesel $5.42 at the truck stop on the hi-way
    • Chuck FB
      Joke Thread

      By Chuck FB · Posted

    • txab
      Gas Prices

      By txab · Posted

      $3.59  
    • needafix
      2019+ Brake failure, it's complicated

      By needafix · Posted

      I'm not sure if this should be a new topic, let me know if it's out of place. This my first post. Thanks 85077522 - AC Delco GM Genuine Parts Brake Master Cylinders. Anyone else had to replace this brake master cylinder yet. I didn't do any brake work, it looks like new parts and I've had the truck for about 4k miles, 119k total miles.  When it started to throw codes I did the calibrations with a bidirectional scanner and got the codes to clear but they came back so I did the routine; base bleed, automated bleed and final base bleed. All that with Bosch ES16-32N fluid (please look it up). That seemed to fix it but 100ish miles later it failed again so I ran the same process but with a pressure bleeder this time and got the same results, fixed for 100ish miles. The original fluid looked bad and I thought I got most of it out, it could've been the wrong fluid. The codes; P25A2, C05B0-00, C2A1B. I can get them to clear but not for long. The C05B0 indicates a leak in the front circuit (which is bone dry) so I'm thinking of doing the bleed process on that front again today and I don't know if that's taboo to just do the front but at this point it seems like it's worth the try anyway. The new master cylinder/module unit is supposed to get here today. But now I'm pretty much convinced this install is over my head. I've called several shops and some mobile guys that I know but this thing is like radio active material, scary wise. I did get 2 local shops say they should be able to do it, one says he has the SPS2 programing capability. And with the battery disconnected is there supposed to be pedal resistance, mine is to the floor, then if I pump it I can get some resistance. I had a panic stop prior to this issue which may have contributed from what I read. And on the first attempt to bleed and hydraulic test the scanner listed things to look for and one was any gaps between the pad and rotors which I did notice on the RF corner and I removed the outer pad (where the gap was) cleaned it and the hardware and didn't see a gap after that but will re-check it. I read that if pushing the caliper pistons back then you're supposed to open the bleeder so as to not push fluid backwards into the abs module or it will damage it. If that's true then that's also a possibility from the previous owner having the brakes changed before I got it. I'm using an XTool ip500 scanner. Any suggestions, questions and comments welcome. 
    • Donstar
      Navigating senior years.

      By Donstar · Posted

      Next Friday will be my 6 week point from my right knee replacement.  The surgeon says it will be fine if I choose to drive after this checkup.  I know I could drive now but best to do as my surgeon (and my wife) tell me.  Richard compared being 62 to 72.  I remember when I was in my early 60's I was experiencing slow but regular decline in my mobility.  Thanks to good medical support,  i continued to fight the speed and spread of this decline. During my 60's I worked on non-surgical methods and just when I turned 70, my orthopedic surgeon recommended joint replacements.  In a little over a year, I had one shoulder and both knees replaced.  This hasn't been a terribly fun experience, but worth the discomfort as my future mobility health trajectory has reversed.  It is a treat to now be watching my mobility. balance and confidence steadily improve!

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...