P1DAC – BMW DTC

BMW DTC P1DAC – A/C Coolant Heater Control Module Temperature/Coolant Temperature Correlation

DTC P1DAC meaning on BMW

DTC P1DAC on a BMW refers to a fault in the A/C Coolant Heater Control Module Temperature/Coolant Temperature Correlation. This diagnostic trouble code indicates that there is a discrepancy between the temperature readings of the A/C coolant heater control module and the engine coolant temperature sensor.

BMW DTC P1DAC symptoms

Symptoms of BMW DTC P1DAC may include:

• Check Engine Light illuminated
• Inaccurate temperature readings on the dashboard
• Issues with the heating or cooling system

BMW DTC P1DAC causes

Common causes of BMW DTC P1DAC include:

• Defective A/C coolant heater control module
• Malfunctioning engine coolant temperature sensor
• Wiring or connection issues between the control module and sensor

BMW DTC P1DAC seriousness

While BMW DTC P1DAC may not directly affect the drivability of the vehicle, it is important to address this issue promptly to prevent potential damage to the heating or cooling system. Ignoring this fault could lead to inefficient operation of the climate control system.

How to diagnose DTC P1DAC on BMW

To diagnose BMW DTC P1DAC, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code
2. Inspect the A/C coolant heater control module and engine coolant temperature sensor for any visible damage
3. Check the wiring and connections for any signs of wear or corrosion
4. Perform a temperature comparison test between the two sensors to identify any discrepancies

How to fix DTC P1DAC on BMW

To fix BMW DTC P1DAC, the following steps may be taken:

1. Replace the faulty A/C coolant heater control module or engine coolant temperature sensor
2. Repair any damaged wiring or connections
3. Clear the fault code from the vehicle’s ECU
4. Perform a test drive to ensure the issue has been resolved

How to erase DTC P1DAC on BMW

To erase BMW DTC P1DAC, the fault code can be cleared using a diagnostic scanner. After the necessary repairs have been made to address the underlying issue, the code can be reset to turn off the Check Engine Light and ensure the fault does not reoccur.

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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