97 jimmy code p1870

Reply

  #1  
Old 05-10-06, 04:41 PM
New Member
Thread Starter
Join Date: Jan 2004
Posts: 114
97 jimmy code p1870

4x4 4.3L auto 108,000
check engine light came on, started shifting rough especially into 2nd gear. So i pulled into auto parts store they pulled codes of misfire cylinder 4 and code p1870. this code isn't in my hanes or chilton. The misfire was a simple spark plug wire came off at plug. check engine light is staying off. seems to be running and shifting ok. so what is p1870? any help is appreciated.
Thanks
 
Sponsored Links
  #2  
Old 05-11-06, 09:22 AM
Member
Join Date: Feb 2005
Location: Frozen Tundra, WI
Posts: 304
P1870

I did a little looking and it appears the code is for internal transmission slippage (do a google search on P1870 and you can get some info). It sounds like GM vehicles in this time frame are known to have issues with this. In the few minutes I was able to read about it, it looks as though there is a fix for the problem.
 
  #3  
Old 05-11-06, 07:11 PM
New Member
Thread Starter
Join Date: Jan 2004
Posts: 114
thanks dave. looks like it's going to cost me to fix this one
 
  #4  
Old 05-12-06, 04:29 AM
Member
Join Date: Feb 2005
Location: Frozen Tundra, WI
Posts: 304
Info

Do you still have the light? The reason I ask is, based on the other problem (rough running due to plug wire loose), I would not consider it out of the ordinary for rough running to make whatever sensor gives you the P1870 think the transmission had a problem (it would just seem odd to me that both would happen at the same time independent of each other).

This may be one of those problems (based on what I got from the google search) that you might want more than one opinion from experts (which I am not).
 
  #5  
Old 05-12-06, 06:49 AM
Member
Join Date: May 2006
Posts: 7
P1870 Code

There is a possibility your 1870 code could have been caused by the misfire. If you have the codes cleared and drive it at least 100 miles and the code (1870) does not come back, you could be ok. Tha truck has a 4L60E trans in it, they are notorious for 1870 codes. If the code does come back, you don't neccessairly have to overhaul the trans. The code is often caused by abnormal wear of one of the piston bores in your valve body. The bore wears into the shape of an egg so to speak, this causes fluid in the valve body to "blow by" that piston, thus, the vehicle shifts slow causing slippage setting the 1870 code. There is an 1870 code kit that includes a larger piston and a drill to bore out the cylinder (Please, unless you have done this before, don't attempt it on your own.). Before someone talks you into an o'haul, take it to a reputable trans shop and have it checked for that. It is considerably less expensive then an o'haul. One important thing is how many miles on the truck?
 
  #6  
Old 05-12-06, 06:52 AM
Member
Join Date: May 2006
Posts: 7
1870 code

I just saw your miles, if the trans has been properly maintained, it should be ok for the 1870 code fix.
 
  #7  
Old 05-12-06, 01:26 PM
New Member
Thread Starter
Join Date: Jan 2004
Posts: 114
Thanks for the input. I'll drive a little more if it comes back I'll take it in. I've never done any internal tranny work.
 
  #8  
Old 05-12-06, 02:33 PM
Member
Join Date: May 2006
Posts: 7
1870

No problem on the reply, I have a trans shop, any questions, feel free to ask!
 
  #9  
Old 05-13-06, 02:58 AM
Member
Join Date: Aug 2003
Location: Barre,Vermont
Posts: 472
Chances are real good that the p1870 code will return. The code sets when excessive torque convertor slip speeds are occurring. And the cause is usually but not always limited to a hydraulic leak in the valve body. Replacement or aftermarket modification of the torque convertor clutch valve body bore is the fix.
 
Reply


Thread Tools
Search this Thread
Display Modes
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 02:20 PM.