Engine Immobilizer Power Stage Circuit
1992-1998 BMW 325i E36 2.5L I6 M50
Description
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
- Check EWS communication with scan tool
- Test EWS antenna ring signal
- Verify key transponder function
- Check EWS-DME alignment status
- 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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1570 on Other Vehicles
Common Questions
What does code P1570 mean on a 1992-1998 BMW 325i E36?
P1570 stands for "Engine Immobilizer Power Stage Circuit". 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.
What are the symptoms of P1570 on a BMW 325i E36?
Common symptoms of P1570 include: Engine cranks but will not start, Immobilizer warning light on, No fuel injection pulse, No spark output, Key symbol on dashboard.
What causes P1570 on a 1992-1998 BMW 325i E36?
Common causes of P1570 include: Faulty EWS module, EWS-DME synchronization lost, Damaged EWS antenna ring around ignition, Key transponder failure, DME EWS alignment data corrupted.