BMW DTC P1C85 – Universal Charger Extension Control Module DC/DC Converter Resonant Inductor Temperature Sensor/Transformer Temperature Sensor Correlation
DTC P1C85 meaning on BMW
The DTC P1C85 on BMW refers to an issue with the Universal Charger Extension Control Module DC/DC Converter Resonant Inductor Temperature Sensor/Transformer Temperature Sensor Correlation. This diagnostic trouble code indicates a problem with the correlation between the temperature sensors associated with the DC/DC converter resonant inductor in the charger extension control module.
BMW DTC P1C85 symptoms
Symptoms of the BMW DTC P1C85 may include:
- Check Engine Light illuminated
- Reduced charging efficiency
- Erratic charging behavior
- Vehicle may go into reduced power mode
BMW DTC P1C85 causes
Potential causes of the BMW DTC P1C85 include:
- Faulty temperature sensors
- Wiring issues or poor connections
- Defective DC/DC converter resonant inductor
- Problems with the control module
BMW DTC P1C85 seriousness
The seriousness of the BMW DTC P1C85 code lies in its potential to affect the charging system of the vehicle. If left unresolved, it can lead to charging inefficiencies, potential battery issues, and overall electrical system malfunctions.
How to diagnose DTC P1C85 on BMW
To diagnose the DTC P1C85 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections related to the temperature sensors
- Test the functionality of the temperature sensors
- Check the DC/DC converter resonant inductor for any faults
- Verify the operation of the control module
How to fix DTC P1C85 on BMW
Fixing the DTC P1C85 on a BMW may involve the following steps:
- Replace faulty temperature sensors
- Repair or replace any damaged wiring or connections
- Replace the defective DC/DC converter resonant inductor
- Address any issues with the control module
How to erase DTC P1C85 on BMW
To erase the DTC P1C85 on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the codes can be reset to see if the issue has been resolved successfully.
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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