[Jritzgarage]

So i just recently replaced the high-pressure fuel pump on my 2011 e90 335XI. However I have MHD and it’s showing a bunch of different electrical short circuit codes. After some research I thought it may just be because the battery was low, and it was so I charged it and many of the codes disappeared, however I have one code(3 of the same thing) that persists. I don’t think it’s the sensor and I’ve also checked f11 in my fuse box which to the best of my knowledge is the fuse for it. At this point I’m out of ideas. PLEASE HELP!


ISSUE SOLVED

[Tunafish]

You are posting DME Error Code History.. Which means that these codes could not be current..

The current errors will be in screen posted below DME error codes.. This is the screen you need to clear errors on and see what pops back up...

It look 29E0 is the persistent code.. Check the wiring at the charge pipe sensor..
- Defect in wiring harness between DME and
charge-air temperature sensor
- Charge-air temperature sensor defective
- Charge-air temperature sensor has been
tampered with
- Replace DME

[Jritzgarage]

Yes I understand I was submitting the history because the code was recurring it shows up everyone I clear the codes. It was a current error. I’ll check the wiring again when I get home. But I unhooked the charge pipe earlier today and got a new code, absolute pressure temperature sensor short circuit to B+. So I thought it couldn’t be the charge pipe sensor. I thought it was the intake manifold temperature sensor that was in question here?

[Tunafish]

According to the wiring diagram.. The charge pipe has four wire (one for temp) and the intake has three wire (no temp). Now I know that the charge and intake sensors are the same on the n55 PWG engines, so the intake does have a means to measure temperature. But, like I said the wiring shows the intake sensor not using the temp wire. Now the wiring diagram could be wrong is always a possibility but that is the info I am going off of.

I would post the diagram I am going by but its on the laptop and don't know how to get a screen print to show up on this forum. I am going by what's in ISTA.

Your other temperature sensor is the one just past the air filter.. The hot-film mass air flow sensor, which could be a possibility sense the diagram shows a temp sensor, it doesnt label what it is. The sensor on the charge pipe temperature is labeled "intake temperature" ..

How the diagram converts to what the DME report as error is beyond me. Hope that helps ..

[Jritzgarage]

RESOLVED: one of the connections to the dme even thought it was locked in place was not fully seated, unplugged it because it looked slightly higher than the other plugged it back in and bam, fixed. Thanks for the help!

[Tunafish]

Nice! Good job.