BMW P1664: EWS (Electronic Immobilizer) Writing/Reading Error in EEPROM
Is your scanner showing BMW P1664?
No worries. We'll show you what it means and how to deal with it.
BMW P1664: EWS (Electronic Immobilizer) Writing/Reading Error in EEPROM
OVERVIEWWhat Does The BMW P1664 Code Mean?
Key on the DME detected an electrical malfunction regarding the EWS. Check the EWS fuse, the ECU or CAN for fault, turn the ignition off and then on to repeat start calibration.
What Are The Potential Causes Of The BMW P1664 Code?
Below are some potential causes of this DTC:
- Circuit from the MIL to the DME
- ECU Failure, BUS system failure
- Circuit from the EPC to the DME
- Defective CAS
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> BMW Electronic Control Unit (DME) - Genuine BMW 12147551615
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
BMW P1664, DTCDECODE.
