No communication with the TCM. Car is in limp mode

Eduardo from Clewiston Technician Posted   Latest   Edited  
Question
Driveability
Network Communications
2006 Chrysler 300 C 5.7L (H) 5-spd (NAG1)
P0605 - Internal Control Module Read Only Memory (ROM), Error
U0101 - Lost Communication with TCM
Car Will Not Accelerate Over 40 Mph

Good evening I'm having a issue finding the problem on this 2006 Chrysler 300. I check the power, ground, the high and low bus communication to the TCM and all checks out fine.

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Mario from Weston

 

Diagnostician
 

Load test those powers and grounds, all of them. If they are fine, replace tcm

+1

Matt from Ocala

 

Manager
 

I would disconnect the pcm and see if you have comm with tcm. The P0605 is a pcm failure code for the most part.

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Frank from Toronto

 

Owner/Technician
 

As Mario stated, make sure your power and ground can carry current. I've chimed in because I encountered the identical symptoms and codes no longer than 2 months ago...300srt with nag1.

Used tcm followed by programming was the fix.

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Eduardo from Clewiston

 

Technician
 

Just want to thank everybody for their help really appreciate. Cause of the problem ended up being a bad TCM

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