Jump to content

Check Engine Light,tranny Codes

driscoja

By driscoja
in Ask A GM Technician

Recommended Posts

driscoja New Member

driscoja

Posted
Posted

Greetings, I've got a 2001 HD 2500 with about 59k miles on it. The other day I had to back up to make way for a plow coming down my narrow road. The check engine light came on a few seconds after I put it in reverse. The codes were P0700,P1713 and P0847.The truck is driveable but goes into gear harshly and seems like I've got only three forward gears. I checked and added fluid,it was a little low,changed the spin on filter and looked at the wiring underneath. I had been driving through deep snow that morning and possibly disturbed the electronic connectors to the tranny. Since it was only about 11 degrees when I had the truck on the ramps I didn't dare take the connectors off to clean and reseat them for fear of breaking them. I reset the codes and the truck drove fine till I put it in reverse again. I'll do the connectors when it warms up a little bit. Any other ideas before I go to the dealer? The truck has the 8.1L engine and allison tranny. Thanks

  • 2 years later...
C@TCH Enthusiast

C@TCH

Posted
Posted

I had the same thing happen to me last night.

Hard shifting "N" to "D" & "N" to "R"

PRND321 acting funny

Seems to not shift out of first

Did you figure out what your problem is, I dont want to spend

a fortune fixing this, I only got the truck 2 weeks ago.

Nytemare Senior Enthusiast

Nytemare

Posted
Posted

All 3 of those codes seem to not have anything to do with each other.

 

P1713 is saying you have a problem with the temp sensor

P0847 is pressure sensor

and P0700 is just the generic trans control system

I would say you did pull a plug, since all these wires are going in through the large round connector.

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

+1 ,you got probs,that round plug Aiden is referring to is very difficult to unplug,you have no range codes that would indicate the connector came unpluged at the NSBU (neutral start back up) switch,which is very common in mud/snow

 

 

take it in

 

keep in touch with aht they found plse

C@TCH Enthusiast

C@TCH

Posted
Posted

It was the NSBU (neutral start back up) switch, apperently very common problem with these. Mechanic at the dealer told me last winter they were replacing roughly 1 a day.

Got a new switch at dealer for $200 they had a $70 one like some of the parts stores did. But I opted to get the one GM recomends, everything works fine now.

Only problem to change it, is to remove the 7 wire connector it was almost glued in and had to break the switch around it to get it off.

Archived

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

Go to topic listing

  • Latest Articles

  • Posts

    • CamGTP
      Gas Prices

      By CamGTP · Posted

      It varies a ton around me. Some places are still at $5.00 or higher and others are way down into the $4's.   Offroad diesel was $4.02 at the one station I passed today.
    • Hdwrguy
      2027 Chevrolet Silverado: Official Discussion

      By Hdwrguy · Posted

      So after reading the reveal from Chevrolet, I kept asking myself...why did the trim levels change?   Here are the official ones:   Work Truck (WT): The quintessential fleet truck, built with durable, easy-to-clean interiors for commercial or utilitarian use. Custom: A stylish, road-oriented trim that adds a more refined appearance, standard dual exhaust, and modern exterior styling. Custom Trail Boss: An entry-level off-roader featuring a 2-inch factory suspension lift and 34-inch mud-terrain tires on a budget. Silverado: Serving as the new base consumer truck (replacing the previous LT trim), it comes standard with the Z71 off-road package when equipped with 4WD. Trail Boss: Steps up the off-road hardware with the 2-inch lift, 34-inch tires, monotube shocks, an exclusive off-road hood, and more premium interior options. ZR2: The flagship off-roader. It boasts 35-inch mud-terrain tires, Multimatic DSSV dampers, front and rear electronic lockers, forged carbon-fiber interior accents, and an available hardcore Bison Edition (co-developed with AEV). High Country: The pinnacle of luxury. It replaces bright chrome with modern satin chrome, 22-inch wheels, premium leather, real wood interior trim, a panoramic sunroof, and an exclusive front-passenger touchscreen. As others have stated, why would you want a Silverado - 'Silverado' - wth?? LT needs to remain!!!   Also, there will no longer be a dedicated Z71 model.  All 4x4 trucks will have the Z71 package. Carplay is also something that cannot be removed.  Hopefully it will remain.     I am excited about the 5.7L V8 (350 C.I.D.)  Old school Chevy power.  My only concern is whatever version of AFM/DFM cylinder deactivation.  Too bad that isn't an option a buyer can choose to have or not.   I will definitely be stopping by my local dealership when these trucks start showing up.
    • richard wysong
      Gas Prices

      By richard wysong · Posted

      I haven't seen diesel for less than $5.30 anywhere in my area
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      The not as clean as one would assume theme with the new engine oil, that reminds me of comments over the years with mechanics not always being so on board with filling an oil filter, not from the center anyway due to that typically being the clean side of the filter, danger of some contaminant falling into the filter if not careful but the realization now that the oil may not be as pure as one had assumed it would surely be. Yes it would be possible to fill from the small holes but that means messing with something to prop open the anti drain back valve if the filter is so equipped and not damage that valve in the process. Me, I have hardly ever prefilled an engine oil filter however I have prefilled diesel fuel filters with a filter on a fuel bulk tank and for anyone that has messed with diesel engines with filters and units that have a limited or no way of priming them, putting on a dry filter is a bad day to say the least with those crappy systems. But anyway back to not so clean engine oil, indeed perhaps its not so bad after all that I have not made a practice of prefilling oil filters.    As Grumpy Bear commented on keeping things clean, that I really have to wonder what the typical practice is at a dealer or any other shop that changes engine oil, do they make sure to wipe or wash off the oil plug and certainly if it fell into some gunk or onto a dirty floor, or that they wiped the filter mounting flange and didn't go and use some dirty rag and end up adding dirt to the inside of the head of the filter mount. Or be careless in how they stored or handled the new filter and if they were bumping into items under the vehicle with the filter opening facing up and having dirt drop right into the filter and if so right into the threaded center that is on the clean side. The top side, did they clean away the built up gunk that may be around the filler before removing the cap or to be really careful at that point that something right close to the filler hole that was hidden under the caps flange won't fall into the engine. Or did they clean the funnel or was that just laying there covered in oil from the oil change before and dust kicked up from sweeping the floor stuck to the oil and now that will go running into the next persons engine due to just not cleaning the funnel as "they won't know anyway" attitude as that young guy is more worried about taking a break so he can go outside and smoke a joint. Just random points that came to mind when I think about what some hired personnel may do that the shop foreman has no idea of or perhaps the whole attitude of some shops may be "eh ... who cares, they will never know the difference anyway".  
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      $3.69 for 87 octane.   $4.24 for Diesel in town.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...