Assistance for the 2011 1 Series.

[Matt865]

Greetings, everyone.

I have acquired a non-operational 1 Series, which I assume is equipped with the N57 engine. The individual from whom I acquired it stated that it was diagnosed with a crankshaft sensor issue. However, I was already sceptical of this.


The vehicle cranks but fails to start. Connected to Ista and indicates no sensor malfunction. He also informed me that it features a stage 1 remap.

The logbook indicates it as a 1.6D, however the ISTA lists it as a 2.0D.

I have included images depicting an unusual error indicating a mismatch. It is probable that they have substituted the ECU with a 2.0D model.

However, you are the authorities in this field.

[Matt865]

[ianwh4]

The E81 116d was equipped with the 2.0d N47D20 engine, whereas the 1.6 N47D16 was used in subsequent F series cars.

The initial step I would undertake is to remove the cam sensor and manually rotate the engine to verify if the camshafts are moving, so eliminating the possibility of a broken chain, provided there are no fault codes present.

[Matt865]

Optimal. That alleviates my discomfort somewhat.

Ista displays several trouble codes. For instance, there is no communication with the DDE. However, a further scan indicates that there is partial connectivity. Then FKPS, I believe, but selecting it allows me to activate the fuel pump.


Upon activating the ignition, I do not hear the fuel pump engage. The automobile and engine are in excellent condition, making it a waste to dispose of them.

[ianwh4]

Provide the fault code list and an image of the control unit hierarchy.

[Matt865]

[Matt865]

[ianwh4]

I would assert that the power supply issue to those modules is attributable to a module or wire malfunction.

Develop a test plan and systematically execute the prescribed checks. Examining the circuit diagrams may reveal a common connection among the different modules. I assume the JBE is culpable.


Owned a 5 Series around a year ago with a defective JBE that failed, resulting in the loss of one output, causing other components to remain underpowered upon ignition.