BMW DTC P1D4C – A/C Coolant Heater Phase V Current Sensor Circuit High
DTC P1D4C meaning on BMW
The DTC P1D4C error code on a BMW indicates an issue with the A/C coolant heater phase V current sensor circuit registering a high voltage reading. This fault is related to the system that controls the heating of the air conditioning coolant in the vehicle.
BMW DTC P1D4C symptoms
Symptoms of the BMW DTC P1D4C error code may include:
- Malfunctioning or ineffective air conditioning system
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced heating or cooling performance
BMW DTC P1D4C causes
Potential causes of the BMW DTC P1D4C error code include:
- Faulty A/C coolant heater phase V current sensor
- Wiring or connection issues in the sensor circuit
- Issues with the A/C coolant heater system
BMW DTC P1D4C seriousness
The DTC P1D4C error code should be addressed promptly as it can lead to reduced comfort and functionality of the vehicle’s air conditioning system. Ignoring this issue may result in further damage to related components.
How to diagnose DTC P1D4C on BMW
To diagnose the DTC P1D4C error code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the specific fault code
- Inspect the A/C coolant heater phase V current sensor and its wiring for any visible damage
- Test the sensor’s resistance and voltage readings to determine if it is functioning correctly
How to fix DTC P1D4C on BMW
To fix the DTC P1D4C error code on a BMW, the following steps may be taken:
- Replace the faulty A/C coolant heater phase V current sensor
- Repair any damaged wiring or connections in the sensor circuit
- Ensure proper functioning of the A/C coolant heater system
How to erase DTC P1D4C on BMW
To erase the DTC P1D4C error code on a BMW, the fault must first be diagnosed and fixed. Once the underlying issue has been resolved, a diagnostic scanner can be used to clear the error code from the vehicle’s system memory.
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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