BMW DTC P185E – Transmission Control Module Internal Error EWS (Electronical Immobilizer) Tampering Attempt Recognized
DTC P185E meaning on BMW
DTC P185E is a fault code that indicates an internal error within the Transmission Control Module (TCM) related to the Electronical Immobilizer (EWS) system in a BMW vehicle. The EWS is a security feature that prevents the engine from starting without the correct key. The error code P185E specifically points to a tampering attempt recognized by the EWS system.
BMW DTC P185E symptoms
Symptoms of DTC P185E in a BMW may include:
- Engine not starting
- Immobilizer warning light illuminated on the dashboard
- Loss of communication with the TCM
BMW DTC P185E causes
The causes of DTC P185E on a BMW can vary, but common reasons include:
- Unauthorized access or tampering with the EWS system
- Faulty TCM or EWS module
- Wiring issues or poor connections
BMW DTC P185E seriousness
DTC P185E is a serious fault code as it indicates a potential security breach or tampering attempt on the EWS system. It can lead to the vehicle not starting or being immobilized, posing a significant inconvenience to the driver.
How to diagnose DTC P185E on BMW
To diagnose DTC P185E on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the TCM
- Inspect the wiring and connections related to the EWS system
- Check for any signs of tampering or unauthorized access to the EWS module
How to fix DTC P185E on BMW
Fixing DTC P185E on a BMW may involve the following steps:
- Addressing any wiring issues or poor connections related to the EWS system
- Replacing a faulty TCM or EWS module if necessary
- Resetting the EWS system and reprogramming keys if required
How to erase DTC P185E on BMW
To erase DTC P185E on a BMW, a mechanic can use a diagnostic scanner to clear the fault code from the TCM’s memory. It is important to ensure that the underlying issue causing the fault code has been addressed before clearing it to prevent it from reoccurring.
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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