BMW DTC P1C20 – DC/DC Converter High Voltage Current Sensor Circuit Low
DTC P1C20 meaning on BMW
DTC P1C20 on a BMW refers to the DC/DC Converter High Voltage Current Sensor Circuit Low. This diagnostic trouble code indicates that there is a low voltage reading from the current sensor circuit in the DC/DC converter, which is responsible for converting high voltage power from the hybrid battery to the appropriate voltage for the vehicle’s electrical system.
BMW DTC P1C20 symptoms
Symptoms of DTC P1C20 on a BMW may include:
- Check Engine Light illuminated
- Reduced power or performance
- Issues with hybrid system operation
BMW DTC P1C20 causes
Common causes of DTC P1C20 on a BMW include:
- Faulty DC/DC converter
- Wiring or connection issues in the current sensor circuit
- Defective current sensor
BMW DTC P1C20 seriousness
The seriousness of DTC P1C20 on a BMW depends on the underlying cause. Ignoring this fault code can lead to potential drivability issues and may affect the vehicle’s hybrid system operation. It is recommended to address this issue promptly to prevent further damage.
How to diagnose DTC P1C20 on BMW
To diagnose DTC P1C20 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the wiring and connections in the current sensor circuit
- Test the current sensor for proper operation
- Check the DC/DC converter for any faults
How to fix DTC P1C20 on BMW
To fix DTC P1C20 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connections in the current sensor circuit
- Replace the current sensor if found to be faulty
- If the DC/DC converter is defective, it may need to be replaced
- Clear the fault code and test drive the vehicle to ensure the issue has been resolved
How to erase DTC P1C20 on BMW
To erase DTC P1C20 on a BMW, a diagnostic scanner can be used to clear the fault code from the vehicle’s memory. After the repair has been completed, the code can be erased to reset the Check Engine Light and ensure that the issue has been resolved.
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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