p2138 and p2127 codes

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Lancem86

Junior Member
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Jun 8, 2022
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Location
Piñon Hills, Ca
Ram Year
2017
Engine
3.6L v6
Hey y’all I have a 2017 Ram 1500 tradesman. I threw a code with a red lightning bolt a week ago when I was turning left. Pulled over. Turned the truck off then back on again limp mode was gone and I was able to get home. Next day CEL went away. Now on Saturday after making yet another left same issues popped up. This time after I turned off the truck limp mode went away only to come back on after yet another left. I’ve noticed everytime I turned left it would happen after that. Never turning right. Coincidence? Then I was able to get it home then my truck started to accelerate on its own right when I was pulling up to my house. I have replaced my Throttle body and my accelerator pedal as well and I’m still having the red lightning bolt and same codes popping up. I’m at a loss on where to go from here. Any advice or help would be greatly appreciated
 

csuder99

Senior Member
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May 28, 2014
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Ram Year
2013
Engine
Hemi 5.7
There are actually two throttle or acceleration pedal position sensors. P2138 sets when the PCM detects that the two sensors don't agree. P2127 is a "circuit low" error which could be something in the wiring or the PCM itself. Given that this pops up on left turns only I'm leaning towards wiring, I'd trace the wiring from the pedal towards the firewall and firewall to the PCM in the engine compartment.
 
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Lancem86

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Location
Piñon Hills, Ca
Ram Year
2017
Engine
3.6L v6
That’s what I was afraid of and my next step to look into. I’m not very good with electrical in vehicles so this shall be interesting lol. Thank you
 
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Lancem86

Junior Member
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Location
Piñon Hills, Ca
Ram Year
2017
Engine
3.6L v6
Update!
I took the new gas pedal off and put the old accelerator pedal back on, I had recalibrated the accelerator and TPS and it worked! CEL and Red Lightning bolt are gone!
 

RAM BLKOUT

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Oct 18, 2020
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Location
South Texas
Ram Year
2014
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5.7
How did you recalibrate the tps and gas pedal sensor? I’m having the same issue….
 
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