What this code means

The DME detected a fault in the engine immobilizer (EWS) power stage circuit. The EWS system is not properly communicating with the DME, preventing engine start authorization. This is a critical anti-theft system fault.

Symptoms

• Engine cranks but will not start
• Immobilizer warning light on
• No fuel injection pulse
• No spark output
• Key symbol on dashboard

Common causes

• Faulty EWS module
• EWS-DME synchronization lost
• Damaged EWS antenna ring around ignition
• Key transponder failure
• DME EWS alignment data corrupted

Diagnostic steps

1. Check EWS communication with scan tool
2. Test EWS antenna ring signal
3. Verify key transponder function
4. Check EWS-DME alignment status
5. Inspect wiring between EWS and DME

Repair notes

Re-synchronize the EWS module with the DME using BMW diagnostic software; replace EWS module or key if defective.

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