BMW DTC P0852 – Park/Neutral Switch Input Circuit High
DTC P0852 meaning on BMW
The Diagnostic Trouble Code (DTC) P0852 for BMW refers to the Park/Neutral Switch Input Circuit High. This code indicates that the signal from the park/neutral switch, which is used to determine the transmission gear position, is reading higher than the expected voltage range.
BMW DTC P0852 symptoms
Symptoms of DTC P0852 on a BMW may include:
- Difficulty starting the vehicle
- Inability to shift gears
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P0852 causes
Common causes of DTC P0852 on a BMW include:
- Faulty park/neutral switch
- Wiring or connector issues in the park/neutral switch circuit
- Corrosion or poor connections in the circuit
BMW DTC P0852 seriousness
While DTC P0852 may not always result in immediate drivability issues, it is important to address this code promptly to avoid potential transmission problems and ensure the vehicle operates correctly.
How to diagnose DTC P0852 on BMW
To diagnose DTC P0852 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and related data.
- Inspect the park/neutral switch and its wiring for any visible damage or corrosion.
- Test the park/neutral switch for proper operation using a multimeter.
- Check the voltage readings at the switch and compare them to specifications.
How to fix DTC P0852 on BMW
To fix DTC P0852 on a BMW, you can try the following:
- Replace the faulty park/neutral switch if it is determined to be the cause of the code.
- Repair any damaged wiring or connectors in the park/neutral switch circuit.
- Clean any corrosion from the connections and ensure they are secure.
How to erase DTC P0852 on BMW
To erase DTC P0852 on a BMW, you can clear the code using a diagnostic scanner that has the capability to reset fault codes. Once the issue has been addressed and fixed, clearing the code should prevent the Check Engine Light from reappearing.
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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