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      02-04-2022, 07:54 AM   #1
gordopizza
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Limp mode after JB4 Install

I recently attempted to add the BT module to my JB4. After the installation my car was placed into limp mode with the following engine codes.


108A01 - Charge air temp sensor, electrical: short circuit to B+
1210014 - Charging pressure sensor, electrical: short circuit to B+
1C3101 - Engine oil pressure sensor, plausibility: Pressure to high before engine start
120408 - Charging pressure control: Switch off as a consequence
10BA4B - Charge air temp sensor, cold start: Charge air temp too low

Car was running fine on Map 2 and Map 1 before the install. I have tried to clear the codes using a conventional reader as well as disconnecting the battery to clear any residual power. I am not really sure how to proceed here besides checking the fuses next.

Thank you
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      02-04-2022, 08:54 AM   #2
gordopizza
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To add I have also completely removed the JB4 and cleared codes along with the battery reset.
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      02-04-2022, 09:28 AM   #3
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Here is a thread another user created a few years ago, he had 3 of the same codes

https://f30.bimmerpost.com/forums/sh....php?t=1506965

He also later posted the solution

Followup:

The issue was that the wire harness from the TMAP sensor in the CP to the ECU had been pulled out of the ECU, thus no signal was being sent. When the CP blew it also dislodged the harness from the intensity of the "explosion" that occurred when the CP blew apart. Indy shop rewired the harness and I am now good to go!
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