[BLITZ]

Its not an F30 but its the B series diesel engine family.

Hello I bought a F56 Mini with the 1.5 B37 diesel engine. I had all sorts of codes and found out the DDE was flooded with diesel with all the fuel related plugs wet. I presume the Fuel pressure sensor was leaking and it spread across the engine wiring harness. The car always started and ran well or badly intermittently. I removed the ECU and removed the cover and tried to clean it with electrical contact cleaner to clean all the diesel out of the DDE. Cleaned all connections and dried everything. Once everything was put back together the I started the car and it ran like a watch better than ever. After 15 minutes of idling the car stalled and would crank but no start.

I have a CODE: 267200 injectors cylinders 1 2 3 4 activation short circuit

I have checked power from the injector plug with the ignition on and there is no voltage. There is continuity between the two pins and when I ground them. I'm guess the issue I have lies within the ECU and maybe something has shorted internally thus not providing power to the injectors.

Has anyone come across this problem and is there a relay or fuse that controls power to the injectors?

[Eddamoo]

I've never come across this problem, but one thing i can say is that Diesel is a dielectric (its non-conductive) so having it within electronics should make no difference at all - diesel would not cause a short. I dont think cleaning your DDE would have done anything positive unless water had got in there...

If you have continuity on both pins when 1 is grounded, i think that means you have a dead-short which corroborates with the error code you have. You need to follow the +ve wires until that dead short stops.

You should be able to find a wiring diagram here: https://onl-osmc-b2i.bmwgroup.com/os...avigation=true

[BLITZ]

Hi sorry just seen this reply. I will try that and report back.

[BLITZ]

Just double checked all the wires from the injector plugs to the DDE plug and there are not wire shorts. The fact all 3 injectors have shorts makes me think its something internal in the DDE.

[BLITZ]

Hi current update. The ECU was cloned with a good used one and it now starts but it has all the issues pre non start saga. The story with the car is that I bought it with swirl flap issues and other codes in the DDE. The car ran well although is was low on power. I suspected seized swirl flaps due to carbon build up. I removed the intake manifold and someone has been in there before and removed the swirl flaps and fitted a blacking plug. Once everything was back to together I then encountered random short to ground codes and lots of other codes. It ran badly intermittently and would buck and jerk on acceleration and also stall. At its worse there were be now pre supply pressure reading. I then found out all the fuel wiring and connectors and diesel everywhere all the way up to the ECU which was full of diesel which was caused by a leaking fuel pressure sensor which I replaced. I cleaned all the connectors and the ECU which is when after starting it up the injectors drivers in the ECU shorted out. I sent out the old ECU with a good used ECU to be cloned.

Fast forward to today I'm still chasing these short to ground codes. All the connectors are secure. The power supply box which supplies power to the ECU look fine and all the fuses are intact. The only thing I noticed is the main DDE relay gets warm. I can't see any wiring issues and the ground connections seem fine.

Does anyone have any ideas of where to look next?

Diagnostic report when I first got the car

2C3200 Swirl flaps: Kinematic worn or lever broken ---- Permanent

279100 Swirl flaps: Mechanical fault during the adaptation --- Intermittent

284300 Exhaust temperature sensor upstream of the oxidation
catalytic converter, signal: Not plausible Intermittent

284400 Exhaust-gas temperature sensor upstream of diesel
particulate filter, signal: Not plausible Intermittent

28EC00
Exhaust gas pressure sensor upstream of exhaust
turbocharger, ambient pressure sensor, signals:
Implausible relative to each other during after-run
Intermittent

2AB300 DDE: Internal fault (ambient pressure sensor, signal: Too
low) Intermittent

2BE700 Electric fuel pump: Engine speed missing or not detected Intermittent

279000 Swirl-flap actuator position, long-term drift: Deviation too
high (current/new condition) Intermittent

28DE00 Exhaust backpressure sensor before turbocharger, signal:
Dynamics implausible Permanent

290B00 Air mass system: Measured air mass too low Permanent



Diagnostic codes today

284300 Exhaust temperature sensor upstream of the oxidation
catalytic converter, signal: Not plausible Intermittent

284400 Exhaust-gas temperature sensor upstream of diesel
particulate filter, signal: Not plausible Intermittent

240500 Exhaust-gas recirculation control: Air mass too high Intermittent

279000 Swirl-flap actuator position, long-term drift: Deviation too
high (current/new condition) Intermittent

255B00 EGR valve, position control: Valve closed too loosely Intermittent

279100 Swirl flaps: Mechanical fault during the adaptation Intermittent

25E200 Exhaust gas pressure sensor, diesel particulate filter,
signal: Open circuit or short circuit to ground Intermittent

2BAE00 Exhaust-gas temperature sensor upstream of diesel
particulate filter, signal: Short circuit to ground Intermittent

2C3200 Swirl flaps: Kinematic worn or lever broken Intermittent

249600 DDE, supply to sensor system/actuator system 5 V (3):
Short circuit to B+ or ground Permanent

24A100 Charging pressure controller, position sensor signal: Open
circuit or short circuit to ground Permanent

259800 fuel pressure and temperature sensor, pressure signal:
Short circuit to ground Permanent

26CF00 Fuel presupply-pressure control Fuel pre-supply-pressure
too low Intermittent

28D600 Hot film air mass meter, signal: Interruption or short
circuit to ground or positive terminal Permanent

2E0600 Engine start, plausibility: Fuel pre-supply pressure too low
at engine start Intermittent

273F00 Crankshaft sensor, signal: No signal Permanent

Thank you

[Out in the sticks]

I'm fighting the same problem with my 2015 328d - the exhaust temp sensors codes must be a signature of this problem. Mine starts but the fuel in the DDE has now taken out the boost and throttle position sensors putting it in degraded drivetrain mode. I'll be replacing the low pressure temp sensor fuel line (13538594893) and cleaning the DDE but based on your experience I'm beginning to understand why the dealership recommends harness replacement as part of the corrective action for this one.

[BLITZ]

Sorry for the late update. There is a electrical plug on the Injection pump. It still had fuel in the plug. I cleaned it and its been 3000 miles no check engine light and no issues.

[Eddamoo]

Glad you got it sorted and thanks for returning with your outcome, no doubt it will be useful for other people!

I'm still amazed by how Diesel in the connector has caused this problem though. After some googling, it sounds like Diesel itself is a better insulator than air. The only way for it to conduct electricity would be impurities (e.g. water, carbon). Are you 100% sure it was Diesel?