C947

What the code means

Code C947 points to the SRS/Airbag control module. The scanner report lists the fault status as pending fault present during this driving cycle, validated and stored in non volatile memory, validated fault present at time of request — the fault was confirmed at the time of the request and written to the module's non-volatile memory.

The code was read with a Car Scanner ELM OBD2 on a 2011 BMW E90 LCI (saloon, Efficient Dynamics). Code A8C4 from the footwell module (FRM) is present in the same thread at the same time, and the discussion mostly covers lighting faults: the right rear tail lamp, the side turn signals, and the warning light on the instrument cluster.

No single confirmed cause for C947 has been established in this context — the source data contains no confirmed fix for this code.

Symptoms

• Lighting warning light on the instrument cluster when the ignition is switched on. Per the manual, it indicates a fault in any of these lamps: parking, brake, rear fog, signal, interior lighting, or license plate lamps.
• Side turn signals don't work and stopped flashing; replacing the bulbs didn't help.
• Code C947 stays in the SRS/Airbag module as pending after clearing codes and driving the car again.

Diagnosis and repair

1. Check the right rear tail lamps — based on the thread author's experience, this is one of the first things found with codes like these.
2. Connect INPA and ISTA with a BimmerGeeks K+DCAN cable for dealer-level diagnostics — this recommendation came from a participant in the thread.

Common diagnostic mistakes

Replacing the side turn signal bulbs without checking the wiring and modules didn't fix the problem in the case described — the fault remained.

What to keep in mind

The source data gives no confirmed fix specifically for C947. The cause of the code hasn't been established in this context, so start diagnosis by checking the lighting circuits tied to the simultaneous A8C4 fault in the FRM.