BMW CAS Fault Codes: ELV Fault, Processor and Engine Start
Why a BMW shows a list of CAS and steering lock codes, and what to do when the car won’t start.
On many BMWs, the CAS (Car Access System) module recognises the key, works with the immobiliser, allows the engine to start and controls the electric steering lock (ELV). Because it does so much, a CAS fault can show up as several codes at once.
The codes
The scan in the photo above, from a 2009 BMW 320i, listed these in the CAS:
- A11E and A11A CAS: ELV Fault
- A0AF CAS: Processor
- A119 CAS: Power Supply, El. Steering Lock
- A116 CAS: Critical Status, El. Steering Lock
- A0B4 CAS: Engine Start, Starter Operation
- A0B5 CAS: Fault, Road Speed Signal
- CAS: Control-Unit Fault
What the driver notices
- The key is not recognised
- The engine does not crank or start
- The steering stays locked, or a steering lock message appears
CAS or steering lock?
The steering lock and the CAS work together, so codes from one often appear in the other. Reading all the codes, and checking power supply to the steering lock, helps tell which part is at fault before anything is replaced.
How it is fixed
We diagnose the CAS and steering lock, then repair the CAS module. If the car cannot be driven, our pick-up and delivery service can collect it. Our repairs come with a 6-month warranty.
WhatsApp us your BMW model, year and the fault codes.
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ABS or brake light on?
WhatsApp us the fault code, chassis number and car model. We’ll tell you what we can do.