BMW DTC P071D – Transmission Mode Switch ‘B’ Circuit
DTC P071D meaning on BMW
The DTC P071D code on a BMW indicates an issue with the Transmission Mode Switch ‘B’ Circuit. This code is specific to the transmission control system and is triggered when the control module detects a fault in the circuit related to the transmission mode switch ‘B’.
BMW DTC P071D symptoms
Symptoms of the DTC P071D code on a BMW may include:
- Erratic shifting behavior
- Transmission stuck in a single gear
- Loss of power or acceleration
- Illuminated transmission warning light on the dashboard
BMW DTC P071D causes
Common causes of the DTC P071D code on a BMW include:
- Faulty transmission mode switch ‘B’
- Wiring or connector issues in the transmission mode switch circuit
- Defective transmission control module
BMW DTC P071D seriousness
The DTC P071D code should not be ignored as it can lead to drivability issues and potential transmission damage if left unresolved. It is recommended to address this code promptly to prevent further complications.
How to diagnose DTC P071D on BMW
To diagnose the DTC P071D code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the transmission control module
- Inspect the transmission mode switch ‘B’ and its circuit for any visible damage or corrosion
- Check the wiring and connectors associated with the transmission mode switch for continuity and proper connection
- Perform a thorough inspection of the transmission control module for any signs of malfunction
How to fix DTC P071D on BMW
To fix the DTC P071D code on a BMW, the following steps may be taken:
- Replace the faulty transmission mode switch ‘B’ if it is found to be defective
- Repair or replace any damaged wiring or connectors in the transmission mode switch circuit
- If the transmission control module is faulty, it may need to be replaced or reprogrammed
How to erase DTC P071D on BMW
To erase the DTC P071D code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the transmission control module. After the repairs have been made and the issue resolved, the code can be erased to reset the system and turn off the warning light.
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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