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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Electrical Short B+ codes



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      01-30-2022, 03:58 PM   #1
Jake_Brown56
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Electrical Short B+ codes

I just got done replacing my high pressure fuel pump and got every thing put together. after plugging in my battery i went to start the car and it just kept cranking. I assumed that it was just the fact that there was little to no fuel in the line so i tried a agin and no luck. when I checked for codes I got several codes ending in " Electrical: short circuit to B+". I do know that the car will get codes of the battery is to low but it was sitting at 12.32V. any suggestions on what to do as i cannot figure it out myself. below is the list of codes that read.
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      01-30-2022, 05:16 PM   #2
wheela
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Did you remove your intake manifold? Maybe double-check all of those harness connections to the DME?
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      01-30-2022, 05:57 PM   #3
glocknick
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Quote:
Originally Posted by wheela View Post
Did you remove your intake manifold? Maybe double-check all of those harness connections to the DME?
This is what I would do. Check all connectors and grounds you removed when replacing the fuel pump. I would physical disconnect the connectors and reconnect them.
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      01-30-2022, 08:20 PM   #4
Jake_Brown56
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Quote:
Originally Posted by wheela View Post
Did you remove your intake manifold? Maybe double-check all of those harness connections to the DME?
I think i figured it out. I seemed to not get one of the the three big connectors on the DME all the way in hopefully that solved it. thanks for the help, much appreciated.
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      02-03-2022, 12:24 AM   #5
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Clear the codes before you try again.
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      02-13-2022, 11:20 AM   #6
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when i had cowl totally removed i washed the car 3 times and water got into the coil heads and caused my dme to short more times than it could handle each start of the car.

had all the b+ faults the car had to offer
solved by replacing the dme
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      03-19-2022, 08:52 PM   #7
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Quote:
Originally Posted by katsooba View Post
when i had cowl totally removed i washed the car 3 times and water got into the coil heads and caused my dme to short more times than it could handle each start of the car.

had all the b+ faults the car had to offer
solved by replacing the dme
One of the main connectors on the DME wasn't all of the way plugged in. no more B+ codes. thanks though.
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      03-20-2022, 02:52 PM   #8
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Quote:
Originally Posted by Jake_Brown56 View Post
One of the main connectors on the DME wasn't all of the way plugged in. no more B+ codes. thanks though.
great relief! haha
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