BMW DTC P1CE4 – DC/DC Converter Temperature Sensor ‘B’ Temperature Out of Range Low
DTC P1CE4 meaning on BMW
The DTC P1CE4 on a BMW indicates an issue with the DC/DC Converter Temperature Sensor ‘B’, specifically that the temperature reading is out of range low. The DC/DC converter is responsible for converting high voltage direct current (HVDC) from the high-voltage battery into the low voltage direct current (LVDC) needed to power various systems in the vehicle.
BMW DTC P1CE4 symptoms
Symptoms of the DTC P1CE4 on a BMW may include poor fuel efficiency, reduced power output, and in some cases, the vehicle may go into a reduced power mode to prevent further damage.
BMW DTC P1CE4 causes
The most common causes of the DTC P1CE4 on a BMW are a faulty DC/DC Converter Temperature Sensor ‘B’, wiring issues, or a malfunction in the DC/DC converter itself.
BMW DTC P1CE4 seriousness
While the DTC P1CE4 may not cause immediate drivability issues, it is important to address this fault promptly to prevent further damage to the vehicle’s electrical system and ensure optimal performance.
How to diagnose DTC P1CE4 on BMW
To diagnose the DTC P1CE4 on a BMW, a diagnostic scan tool capable of reading BMW specific fault codes will be needed. The technician will need to inspect the DC/DC Converter Temperature Sensor ‘B’, check the wiring for any damage or corrosion, and test the functionality of the DC/DC converter.
How to fix DTC P1CE4 on BMW
Fixing the DTC P1CE4 on a BMW may involve replacing the DC/DC Converter Temperature Sensor ‘B’, repairing any damaged wiring, or replacing the DC/DC converter if necessary. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts for the best results.
How to erase DTC P1CE4 on BMW
Once the underlying issue causing the DTC P1CE4 on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. This will reset the vehicle’s onboard computer 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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