BMW DTC P0898 – Transmission Control System MIL Request Circuit Low
DTC P0898 meaning on BMW
DTC P0898 in a BMW indicates a fault with the Transmission Control System MIL Request Circuit. This code is triggered when the transmission control module (TCM) detects that the signal voltage from the MIL (Malfunction Indicator Lamp) request circuit is lower than the specified threshold.
BMW DTC P0898 symptoms
Symptoms of DTC P0898 in a BMW may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Transmission shifting issues
- Reduced fuel efficiency
- Vehicle may go into limp mode
BMW DTC P0898 causes
Common causes of DTC P0898 in a BMW include:
- Faulty MIL request circuit wiring
- Defective Transmission Control Module (TCM)
- Loose or corroded electrical connections
- Software issues in the TCM
BMW DTC P0898 seriousness
While DTC P0898 may not always result in immediate drivability issues, it is important to address this fault promptly to prevent potential transmission problems and ensure the vehicle operates optimally.
How to diagnose DTC P0898 on BMW
To diagnose DTC P0898 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 MIL request circuit wiring for any damage or corrosion
- Check the TCM for proper operation and software updates
- Test the electrical connections for proper voltage and continuity
How to fix DTC P0898 on BMW
To fix DTC P0898 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring in the MIL request circuit
- Replace the Transmission Control Module (TCM) if found to be faulty
- Ensure all electrical connections are secure and free of corrosion
- Update the TCM software to the latest version
How to erase DTC P0898 on BMW
To erase DTC P0898 on a BMW, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made, the code can be reset, and the Check Engine Light should turn off. It is important to verify that the issue has been resolved before clearing the code 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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