engine code p1781
First time posting, Dr. Evil said to find the correct post, and post there, hope this is it.
I have a 2001 silverado 2500hd engine code p1781 poor or lost communication to TCM ( transmission control module ??) Found TSB 01-06-04-020 for this code but could not find information on how to correct this. Can anyone help me with this? Sure hate to take it to the dealer ( ouch!! ):scare2: Thanks in advance for any help.:tu: mcanfield |
Have you checked the connections both at the TCM and the back of the transmission?
|
Thanks for the reply.
With your knowledge of this, can you tell me what and where is the TCM. I believe I can find the connection at the back of the tranny ( I hope ) Do I assume you are from Wisconsin? I recently moved from south eastern Wisconsin to here in south western Kentucky, yup! Kentucky, we love it here, great weather and much much lower taxes. |
The TCM is Transmission Control Module. I see you put another post up.
|
Thanks to all that helped with this, I found with more research that a low battery condition can cause erratic codes. This is what the problem was all along. After finding about the low battery condition , believe or not, the next day I went to start my truck and it would barely turn over. I put it on my charger and got it to start, went to Auto zone for their free battery check, found one battery completely dead the other only 70%.
Changed both batteries with 1000 cranking amps. the code went away and has not returned so far. Thanks again:jump::tu: mcanfield |
All times are GMT -5. The time now is 09:25 AM. |
© 2024 MH Sub I, LLC dba Internet Brands