BMW DTC P071B – Transmission Mode Switch ‘A’ Circuit Low
DTC P071B meaning on BMW
DTC P071B refers to the Transmission Mode Switch ‘A’ Circuit Low in BMW vehicles. This diagnostic trouble code indicates that there is a low voltage condition detected in the circuit related to the transmission mode switch ‘A’.
BMW DTC P071B symptoms
Symptoms of DTC P071B in a BMW may include issues with shifting gears, the transmission not responding correctly to mode changes, and potentially triggering the transmission warning light on the dashboard.
BMW DTC P071B causes
The causes of DTC P071B in a BMW can vary, but common reasons include a faulty transmission mode switch ‘A’, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module.
BMW DTC P071B seriousness
While DTC P071B may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential transmission problems and ensure the vehicle operates correctly.
How to diagnose DTC P071B on BMW
To diagnose DTC P071B on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the trouble codes and then perform a thorough inspection of the transmission mode switch ‘A’, related wiring, and connectors to identify any faults or damages.
How to fix DTC P071B on BMW
Fixing DTC P071B on a BMW may involve replacing the faulty transmission mode switch ‘A’, repairing or replacing damaged wiring or connectors, or addressing any issues with the transmission control module. It is recommended to follow the manufacturer’s repair procedures for a proper fix.
How to erase DTC P071B on BMW
Once the underlying issue causing DTC P071B has been resolved, the diagnostic trouble code can be erased using a diagnostic scanner capable of clearing codes. This will reset the system and turn off the warning light on the dashboard.
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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