"Check Engine" Warning over bumps
 

Getting a "Check Engine" warning on the screen for maybe 1/4 of a second every couple of days.

Looks to be related to when the car goes over a large bump (e.g. hump back bridge).

Any ideas?

loose connection

In the bridge or the car????????????????

no lights coming on on the bridge

Found mine was the connector on the diesel filter head. Unplugged and plugged in a few times and problem solved.

T4 may have logged it in the EMS history

Do you know how you found this out? The engine performance feels ok when it happens.
I don't have access to a T4 unfortunately. I've tried using a Scanguage which reports no errors, and a BMW scanner which doesn't seem to show any obvious errors.

With the LP pressure sensor unplugged you won't notice any difference in the way the car drives.

The check engine alarm comes on in this instance to let you know the LP fuel pressure sensor is open circuit.

are you mafless?

it could be the temp sensor on the maf failing..

No, it has a relatively new genuine Bosch MAF.I've unplugged, cleaned and reconnected the connection.

I've had the fuel filter out twice this year replacing the UBP so it could be that.