BMW DTC P1C74 – Universal Charger Extension Control Module DC/DC Converter High Voltage Current Sensor Circuit Low
DTC P1C74 meaning on BMW
DTC P1C74 is a diagnostic trouble code that indicates an issue with the Universal Charger Extension Control Module DC/DC Converter High Voltage Current Sensor Circuit being detected as low in a BMW vehicle.
BMW DTC P1C74 symptoms
Symptoms of BMW DTC P1C74 may include:
- Check Engine Light illuminated on the dashboard
- Reduced power or performance
- Issues with charging the vehicle’s battery
BMW DTC P1C74 causes
Common causes of BMW DTC P1C74 may include:
- Faulty Universal Charger Extension Control Module
- Wiring or connection issues in the high voltage current sensor circuit
- Internal faults in the DC/DC converter
BMW DTC P1C74 seriousness
The seriousness of BMW DTC P1C74 lies in the potential impact on the vehicle’s charging system and overall performance. Ignoring this code may lead to further electrical issues and potential battery-related problems.
How to diagnose DTC P1C74 on BMW
To diagnose DTC P1C74 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the Universal Charger Extension Control Module and related components for any visible damage
- Check the wiring and connections in the high voltage current sensor circuit
How to fix DTC P1C74 on BMW
To fix DTC P1C74 on a BMW, the following steps may be taken:
- Replace the faulty Universal Charger Extension Control Module if necessary
- Repair any damaged wiring or connections in the high voltage current sensor circuit
- If internal faults are found in the DC/DC converter, it may need to be replaced
How to erase DTC P1C74 on BMW
DTC P1C74 can be erased from the BMW’s system using a diagnostic scanner that has the capability to clear fault codes. Once the underlying issue has been addressed and fixed, the code can be cleared to reset 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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