Check Engine Light and Throttle Position Warning

[cj7ox]

To start, I have a 2020 JLU Rubicon with the 3.0L Diesel. Last week I got the dash warning light freakout, so assumed it was in need of replacement batteries. I got new main and aux batteries, and cleared the DTCs. Things went swimmingly until this morning. I leave for work this morning, and before I could get out of the apartment complex parking lot, the throttle surged to 2k rpm, CEL and Red Lightning Bolt lights up. I pulled in to a nearby parking spot and shut the vehicle off to diagnose. Checked the plug behind the accelerator pedal, and it was a tiny bit loose. Pressed it in, and got a click. I started it up and drove to work with no issue. When I got to the office and parked, I pulled codes via JSCAN and got the following:

------------------------------
ANTI LOCK BRAKES
------------------------------
#C121C-00
torque request signal denied-stored

#U0401-00
invalid data received from ecm/pcm a - no sub type information implausible data received from ecm/pcm ""a""- stored

------------------------------
BODY CONTROLLER
------------------------------
#U1514-87
engine controller secret code - missing message engine controller secret code-missing message stored

------------------------------
DRIVER ASSISTANCE SYSTEM
------------------------------
#C2226-00
tcm disabled ecu-stored

#C2227-00
abs disabled ecu-stored

#U0401-00
implausible data received from ecm/pcm ""a""- stored

#C2225-00
pcm disabled ecu-stored

#U0100-00
lost communication with ecm/pcm ""a""-stored

------------------------------
PARK ASSIST
------------------------------
#U0415-00
invalid data received from anti-lock brake system (abs) control module ""a""- stored

------------------------------
POWERTRAIN CONTROL
------------------------------
#P0513-00
immobilizer (signal compare failure) - idn_immo - immo_unknowncode immobilizer wrong key code - signal compare failure immobilizer (wrong code received) stored

#P2138-00
accelerator pedal potentiometer 1 and 2 congruence - signal compare failure accelerator pedal potentiometer congruence (signal compare failure) accelerator pedal position 1 / position 2 plausibility check stored, warning lamp

------------------------------
POWERTRAIN CONTROL - GENERIC
------------------------------
#P2138
accelerator pedal position sensor 1 / 2 correlation active

#P2138
accelerator pedal position sensor 1 / 2 correlation permanent

------------------------------
TRANSMISSION CONTROL
------------------------------
#U1428-00
inaccurate engine torque received-stored, warning lamp


I cleared the codes and went in to work. I am hoping this was all because the accelerator harness was loose. Would that single connector cause all of these codes? Or should I be looking for other issues? I've got a trip tomorrow, so have a short window for troubleshooting/fixing. Thanks in advance!

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[NewbJLUOwner]

Hey there> i remember after installing a pedal monster i had a similar issue, clicked back in harness and troubles went away>hoping it's same for you
Best of luck

 

[26 confirmed]

The same problem with my pedal monster. I ended up just disconnecting it and not using it anymore. I don't know if it just needs an update or some thing.

 

[zouch]

i've seen all kinds of crazy codes from these things when something seemingly unrelated wasn't right.

any update from Tuesday?

To start, I have a 2020 JLU Rubicon with the 3.0L Diesel. Last week I got the dash warning light freakout, so assumed it was in need of replacement batteries. I got new main and aux batteries, and cleared the DTCs. Things went swimmingly until this morning. I leave for work this morning, and before I could get out of the apartment complex parking lot, the throttle surged to 2k rpm, CEL and Red Lightning Bolt lights up. I pulled in to a nearby parking spot and shut the vehicle off to diagnose. Checked the plug behind the accelerator pedal, and it was a tiny bit loose. Pressed it in, and got a click. I started it up and drove to work with no issue. When I got to the office and parked, I pulled codes via JSCAN and got the following:

------------------------------
ANTI LOCK BRAKES
------------------------------
#C121C-00
torque request signal denied-stored

#U0401-00
invalid data received from ecm/pcm a - no sub type information implausible data received from ecm/pcm ""a""- stored

------------------------------
BODY CONTROLLER
------------------------------
#U1514-87
engine controller secret code - missing message engine controller secret code-missing message stored

------------------------------
DRIVER ASSISTANCE SYSTEM
------------------------------
#C2226-00
tcm disabled ecu-stored

#C2227-00
abs disabled ecu-stored

#U0401-00
implausible data received from ecm/pcm ""a""- stored

#C2225-00
pcm disabled ecu-stored

#U0100-00
lost communication with ecm/pcm ""a""-stored

------------------------------
PARK ASSIST
------------------------------
#U0415-00
invalid data received from anti-lock brake system (abs) control module ""a""- stored

------------------------------
POWERTRAIN CONTROL
------------------------------
#P0513-00
immobilizer (signal compare failure) - idn_immo - immo_unknowncode immobilizer wrong key code - signal compare failure immobilizer (wrong code received) stored

#P2138-00
accelerator pedal potentiometer 1 and 2 congruence - signal compare failure accelerator pedal potentiometer congruence (signal compare failure) accelerator pedal position 1 / position 2 plausibility check stored, warning lamp

------------------------------
POWERTRAIN CONTROL - GENERIC
------------------------------
#P2138
accelerator pedal position sensor 1 / 2 correlation active

#P2138
accelerator pedal position sensor 1 / 2 correlation permanent

------------------------------
TRANSMISSION CONTROL
------------------------------
#U1428-00
inaccurate engine torque received-stored, warning lamp


I cleared the codes and went in to work. I am hoping this was all because the accelerator harness was loose. Would that single connector cause all of these codes? Or should I be looking for other issues? I've got a trip tomorrow, so have a short window for troubleshooting/fixing. Thanks in advance!

 

[cj7ox]

So, I've had no issues since I reseated the throttle pedal harness. I guess when I installed the Pedal Commander, I didn't get things fully seated and it just vibrated loose. Fingers crossed.

 

[bmpcamry09]

So, I've had no issues since I reseated the throttle pedal harness. I guess when I installed the Pedal Commander, I didn't get things fully seated and it just vibrated loose. Fingers crossed.

Pedal commanders wreak havoc on these just so you know. Yes, they work, but they work by manipulating the 5V reference signal to “trick” the PCM. Canbus systems do not like this.

Back in my tech and service days I can’t tell you how many times someone would come in with “all the lights on the dash” and it was all because of a PC throwing the Canbus voltage off.

Just my $.02

 

[cj7ox]

Pedal commanders wreak havoc on these just so you know. Yes, they work, but they work by manipulating the 5V reference signal to “trick” the PCM. Canbus systems do not like this.

Back in my tech and service days I can’t tell you how many times someone would come in with “all the lights on the dash” and it was all because of a PC throwing the Canbus voltage off.

Just my $.02

Thanks for the heads up! I'll keep an eye on it. For the 10 months prior to install, there were no issues, and there've been none since i reseated the connector.

 

[NewbJLUOwner]

So, I've had no issues since I reseated the throttle pedal harness. I guess when I installed the Pedal Commander, I didn't get things fully seated and it just vibrated loose. Fingers crossed.

I removed my pedal monster and just went back to factory. Yes, there was a significant difference, however didn't want to screw with factory warranty
After re-seating the connection, no issues since over 30k miles now as well
Best of luck

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