BMW DTC P1D74 – Heat Pump Temperature Sensor ‘B’ Temperature Out of Range High
DTC P1D74 meaning on BMW
The DTC P1D74 error code on a BMW indicates that the Heat Pump Temperature Sensor ‘B’ is reporting a temperature that is out of the acceptable high range. This sensor is responsible for monitoring the temperature of the heat pump system in the vehicle.
BMW DTC P1D74 symptoms
Symptoms of the DTC P1D74 error code on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Reduced heating or cooling performance in the vehicle
- Increased fuel consumption
BMW DTC P1D74 causes
Common causes of the DTC P1D74 error code on a BMW include:
- Failed Heat Pump Temperature Sensor ‘B’
- Wiring or connection issues related to the sensor
- Faulty control module
BMW DTC P1D74 seriousness
The DTC P1D74 error code should not be ignored as it can lead to reduced efficiency of the heat pump system in the vehicle. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P1D74 on BMW
To diagnose the DTC P1D74 error code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the Heat Pump Temperature Sensor ‘B’ and its wiring for any visible damage
- Test the sensor’s resistance and voltage readings
- Check the control module for any faults
How to fix DTC P1D74 on BMW
To fix the DTC P1D74 error code on a BMW, the following steps may be taken:
- Replace the faulty Heat Pump Temperature Sensor ‘B’
- Repair any damaged wiring or connections related to the sensor
- If necessary, replace the control module
- Clear the fault codes and reset the system
How to erase DTC P1D74 on BMW
To erase the DTC P1D74 error code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s system. Once the repairs have been made and the issue resolved, the fault codes can be cleared to reset the system.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.