BMW DTC P0879 – Transmission Fluid Pressure Sensor/Switch ‘D’ Circuit Intermittent
DTC P0879 meaning on BMW
DTC P0879 indicates a fault with the Transmission Fluid Pressure Sensor/Switch ‘D’ Circuit in a BMW vehicle. This fault is intermittent, meaning that the issue may not be present at all times. The sensor/switch ‘D’ is responsible for monitoring the transmission fluid pressure and providing feedback to the vehicle’s control module.
BMW DTC P0879 symptoms
Symptoms of DTC P0879 in a BMW may include erratic shifting behavior, harsh shifting, transmission slipping, or the transmission going into limp mode. The vehicle’s transmission warning light may also illuminate on the dashboard.
BMW DTC P0879 causes
The most common causes of DTC P0879 in a BMW include a faulty transmission fluid pressure sensor/switch ‘D’, damaged wiring or connectors in the sensor circuit, low transmission fluid level, or a malfunctioning transmission control module.
BMW DTC P0879 seriousness
DTC P0879 should be addressed promptly to prevent further damage to the transmission system. Ignoring this fault can lead to more severe transmission issues and potentially costly repairs in the future.
How to diagnose DTC P0879 on BMW
To diagnose DTC P0879 on a BMW, a mechanic will typically use a diagnostic scanner to retrieve the fault code and perform a visual inspection of the transmission fluid pressure sensor/switch ‘D’ and its wiring. They may also conduct a test drive to observe the transmission’s behavior and monitor the sensor’s readings.
How to fix DTC P0879 on BMW
Fixing DTC P0879 on a BMW may involve replacing the transmission fluid pressure sensor/switch ‘D’, repairing any damaged wiring or connectors, ensuring the transmission fluid level is correct, or reprogramming the transmission control module. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts.
How to erase DTC P0879 on BMW
Once the underlying issue causing DTC P0879 has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the vehicle’s onboard computer and turn off the transmission warning light on the dashboard. 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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