[iw335ix]

2012 335i xDrive, Jb4 Map 5
VRSF charge pipe, down pipe and FMI

I've read a ton on all forums but haven't found a solution, others with similar problems but not the same one and using their fixes hasn't worked on mine unfortunately.

I have the MEVD 14726 dme that requires unlock so I sent it to one of MHD's partner companies. Received it back yesterday and installed. Car cranks and runs but is in limp mode with the "engine malfunction" and has codes 29D0 Intake Air Temp Sensor, electrical Short circuit to B+ & 29D2 Intake air temp sensor, signal change Too fast. I've checked all connections, even went as far as disassembling the intake manifold and rechecking all connectors to ensure fitment. All pins in the dme wire ports look good and not bent. I get the same codes whether I unplug any of the three air sensors on the charge pipe (vrsf), intake manifold or intake pipe (BMS).
The codes will clear through MDH app but come back. I'm only trying to flash the backend map. After not getting the codes to go away I went ahead and flashed it in hopes that would help clear them but didn't work so flashed back to Stage 0.
Also my Jb4 will not connect via bluetooth as it did previously before the dme jailbreak. It keeps telling me the password is incorrect. I had no issues with the car prior to disassembly and sending the dme out for unlock.

Suggestions?
Thanks in advance

[DiFFv1]

Might sound simple but i would definitely take out all MAF sensors from intake and chargepipe and spray them with a sensor cleaner

[iw335ix]

Originally Posted by DiFFv1

Might sound simple but i would definitely take out all MAF sensors from intake and chargepipe and spray them with a sensor cleaner

Thanks for the suggestion. I did pick up some cleaner but ended up not cleaning each of the three sensors since all looked really cleaned (car has relatively low mileage) (intake pipe, charge pipe and intake manifold).

I finally got it going late last night with a ton of help from Levan at Bimmer ECU Solutions. He did the dme unlock for me last week and he provided a lot of troubleshooting support. After I received the dme back and installed it I was getting voltage to a ground wire in the Jb4 wire harness and making the intake sensor read off and give me the two 29D codes. I ended up just pulling the Jb4 unit off all together.
All good now and I can now flash MHD.

[DiFFv1]

Originally Posted by iw335ix

Thanks for the suggestion. I did pick up some cleaner but ended up not cleaning each of the three sensors since all looked really cleaned (car has relatively low mileage) (intake pipe, charge pipe and intake manifold).

I finally got it going late last night with a ton of help from Levan at Bimmer ECU Solutions. He did the dme unlock for me last week and he provided a lot of troubleshooting support. After I received the dme back and installed it I was getting voltage to a ground wire in the Jb4 wire harness and making the intake sensor read off and give me the two 29D codes. I ended up just pulling the Jb4 unit off all together.
All good now and I can now flash MHD.

In my honest opinion i would not even use Jb4 on any of my vehicles. And im glad to see your car back in working order. I would also suggest even when something "looks or appears" fine i would still take the proper steps especially since you went out of your way to buy the cleaner