BMW DTC P0846 – Transmission Fluid Pressure Sensor/Switch ‘B’ Circuit Range/Performance
DTC P0846 meaning on BMW
The Diagnostic Trouble Code (DTC) P0846 for BMW refers to an issue with the Transmission Fluid Pressure Sensor/Switch ‘B’ Circuit Range/Performance. This code indicates that the signal from the transmission fluid pressure sensor or switch ‘B’ is outside the expected range or not performing as intended.
BMW DTC P0846 symptoms
Symptoms of DTC P0846 on a BMW may include:
- Harsh shifting
- Transmission slipping
- Transmission overheating
- Transmission not shifting properly
- Check Engine Light illuminated
BMW DTC P0846 causes
Common causes of DTC P0846 on a BMW include:
- Faulty transmission fluid pressure sensor/switch ‘B’
- Wiring or connector issues in the sensor circuit
- Low transmission fluid level or dirty fluid
- Internal transmission problems
BMW DTC P0846 seriousness
Ignoring DTC P0846 on a BMW can lead to further transmission damage and potential safety hazards. It is important to address this issue promptly to prevent more severe problems and costly repairs.
How to diagnose DTC P0846 on BMW
To diagnose DTC P0846 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the transmission fluid pressure sensor/switch ‘B’ and its wiring for any visible damage
- Check the transmission fluid level and condition
- Perform a test drive to observe the transmission behavior
How to fix DTC P0846 on BMW
To fix DTC P0846 on a BMW, the following steps may be taken:
- Replace the faulty transmission fluid pressure sensor/switch ‘B’
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Ensure the transmission fluid level is correct and replace if dirty
- Address any internal transmission issues if necessary
How to erase DTC P0846 on BMW
After fixing the underlying issue causing DTC P0846 on a BMW, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s memory and turn off the Check Engine 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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