Jump to content

Multiple codes from scanner 02 Sierra 2500

Richard Carrino
 Share

Recommended Posts

Richard Carrino Enthusiast

Richard Carrino

Posted
Posted

303863F7-D5E3-4561-B058-11D46A05F9EB.jpeg.5a3ff6d80684370bb5fd1b2cc7357693.jpeg410DB471-A9A3-4BF4-B971-37E9EDB9175E.jpeg.1dd5a92c10b0558028113bb786d0916d.jpeg
 

pulled these codes today. Can anyone help me get started on diagnosing/fixing these issues. I picked up a knock sensor, knock sensor wiring harness, and new intake manifold gaskets which I plan to replace tomorrow. 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

You have two circuit codes for the MAF sensor. Inspect the harness and test the wiring.

 

Possible there is an issue with the harness/connector and or the sensor itself has failed internally and giving off both those codes.

 

Plausible that the MAF sensor issue is a cause for the P0300 misfire code but I would want to see the live data of the scan tool on each cylinder to see what cylinders are misfiring. Then I would tackle that part. Could need plugs and wires.

Richard Carrino Enthusiast

Richard Carrino

Posted
  • Author
Posted

This truck has had an intermittent misfire since I bought it a little over a year ago. I’ve never been able to solve the issue. Plugs and wires were replaced this year. Scanner was used at a local shop, I don’t personally own it. 
I’ll inspect the MAF tomorrow and check the wiring. Electric isn’t my strong suit. Any advice on how to properly diagnose?  Air filter is worth replacing as well, something I havn’t done since purchasing. 

 

Richard Carrino Enthusiast

Richard Carrino

Posted
  • Author
Posted

I learned the hard way yesterday that the knock sensors on the 8.1 are not under the manifold but on the left and right side of the engine.

The intake manifold gasket was shot though, so it was worth replacing, along with the throttle body and MAP gaskets. The engine was clean but the intake manifold had a lot of carbon build up. 
Took some MAF cleaner to the screen and sensor and replaced the air filter which wasn’t too dirty. Upon inspecting the fuse box I found the ENG-1 fuse blown which the MAF is on that circuit. I replaced the fuse and it did not blow so I’m not sure what that was about, I’ll have to watch to see if it blows again. 
I tested the wire at the MAF sensor connector. The power reads 12v, resistance was good, and the yellow wire read 5.1 v which I read it should be in the range of 4.8-5.2. 
Looking to tackle the bank two knock sensor today. 
Anyone else that can shed some light on the issue I’m having or some experience 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • CamGTP
      Scan Tool Recommendation

      By CamGTP · Posted

      I have an Autel, works great for what it is. Can't do some specific things because you need say the GM tool, VCDS for Audi/Volkswagon and others of course. But those times are few and far between for me.   The other tool I'd like to try one day is the new Topdon scan tools. Seen several video's on them and many youtube people review them.    I've never subscribed for updates or payed to do that stuff on my Autel, so I'm sure I'm missing out on some of the updates but I'm fine with that for now.
    • Tyler Gibbs
      PF63 Oil Filters Going Away?

      By Tyler Gibbs · Posted

      Oh dear god why
    • AndrewF
      Scan Tool Recommendation

      By AndrewF · Posted

      I am in the market for a bidirectional scan tool so was hoping someone can help point me in the right direction. There are so many options out there it is hard to narrow down which make/model to choose.   I have always done my own vehicle work so looking to maximize capability with the scanner. Ideal price is $1k or less but would be willing to exceed if it opens up significant benefits.  Currently my 24 2500 is the newest vehicle but also have a few mid to late 2010s Subarus as well.    It seems that the Autel MP900 has a decent amount of features at a reasonable price?
    • C/K Man
      Silverado 4500-5500-6500 are they still being produced? Would have sold better as GMCs as well

      By C/K Man · Posted

      There was talk over the last couple of years that the contract to build these trucks between GM and International would not be renewed.  International moved production of all their other trucks besides the companion CV model out of the Springfield plant some time ago when they opened their San Antonio plant.  That left Springfield only building the Silverado Medium Duty, International CV Series, and some Express/Savanna long wheelbase cutaways.  International also put the plant up for sale some time ago.  This all answered my earlier question as to why GM and International did nothing with these trucks since they were introduced, as they had basically become a market 'placeholder' with a finite life.    The Silverado Medium Duty/International CV trucks were interesting combination of a GM powertrain, electrical system, and K2XX Silverado cab with an International chassis that was supposedly designed for a step-van type vehicle they never produced.  They were manufactured in International's Springfield plant along with the IH MV series initially.  When first introduced, there was much talk that the Silverado Medium Duty/CV would eventually get a gasoline engine option along with other upgrades and GM and IH would work on a class 6/7 joint venture truck.  This was before VW bought Navistar out, after that happened no more was said.  Draw your own conclusions...   About the time talk started that the GM/IH joint venture was not going to be renewed, rumors started that GM would develop a new line of medium duty trucks themselves.  The story is the new trucks will be part of the next generation HD's due in 2028, and will still feature a 'straight rail' chassis design that the current medium duty has.  GM views this as a desirable feature that differentiates their truck from the competition.  A gasoline engine option is also expected.  As the current Silverado Medium Duty remains in production until September 2026 and there is still a lot of inventory available do not expect any official word for some time.   I believe GM remains committed to their successful partnership with Isuzu, and all the LCF models will still be available from Chevy Commercial dealers.  Isuzu is on the cusp of opening a new large plant in South Carolina and there is also speculation that this may result in new product for both Isuzu and Chevy Commercial dealers.                  
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...