BMW DTC P1662 – EWS (Electronic Immobilizer) Telegram Parity Error
DTC P1662 meaning on BMW
DTC P1662 on a BMW refers to an Electronic Immobilizer Telegram Parity Error. This error code indicates a communication issue between the Electronic Immobilizer system and the Engine Control Module (ECM).
BMW DTC P1662 symptoms
Symptoms of DTC P1662 on a BMW may include difficulty starting the vehicle, the engine not cranking, or the engine starting and then immediately stalling. The immobilizer system may also prevent the engine from starting altogether.
BMW DTC P1662 causes
The causes of DTC P1662 on a BMW can vary, but common reasons include a faulty Electronic Immobilizer system, a communication error between the immobilizer and ECM, or issues with the key transponder.
BMW DTC P1662 seriousness
DTC P1662 is a serious issue as it can prevent the vehicle from starting or cause it to stall unexpectedly. It is important to address this error code promptly to ensure the vehicle’s proper operation and security.
How to diagnose DTC P1662 on BMW
To diagnose DTC P1662 on a BMW, a diagnostic scan tool capable of reading BMW-specific fault codes is required. The technician will need to check the communication between the Electronic Immobilizer system and the ECM, inspect the key transponder, and verify the wiring connections for any faults.
How to fix DTC P1662 on BMW
Fixing DTC P1662 on a BMW may involve repairing or replacing the Electronic Immobilizer system, addressing any communication errors, or replacing the key transponder if necessary. It is recommended to consult with a qualified automotive technician or BMW specialist for proper diagnosis and repair.
How to erase DTC P1662 on BMW
To erase DTC P1662 on a BMW, the fault code can be cleared using a diagnostic scan tool. Once the underlying issue has been addressed and fixed, the technician can clear the code to reset the system. It is important to ensure that the repair has been successful before clearing the fault code.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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