BMW DTC P1D19 – Electric A/C Compressor Control Module Internal Temperature Sensor ‘A’/’B’ Correlation
DTC P1D19 meaning on BMW
DTC P1D19 on a BMW refers to the Electric A/C Compressor Control Module Internal Temperature Sensor ‘A’/’B’ Correlation. This diagnostic trouble code indicates that there is a discrepancy between the readings of the internal temperature sensors ‘A’ and ‘B’ within the electric A/C compressor control module.
BMW DTC P1D19 symptoms
Symptoms of DTC P1D19 on a BMW may include issues with the operation of the air conditioning system, such as inconsistent cooling performance or the A/C compressor not engaging properly. Additionally, the vehicle’s climate control system may not function as expected, leading to discomfort for the occupants.
BMW DTC P1D19 causes
The causes of DTC P1D19 on a BMW can vary, but common reasons include a malfunctioning internal temperature sensor within the electric A/C compressor control module, wiring issues, or a fault in the control module itself. Environmental factors or excessive heat exposure can also contribute to sensor discrepancies.
BMW DTC P1D19 seriousness
While DTC P1D19 may not directly impact the drivability of the vehicle, it can affect the comfort and convenience of the occupants, especially in extreme weather conditions. Ignoring this fault could lead to further A/C system problems and discomfort during driving.
How to diagnose DTC P1D19 on BMW
To diagnose DTC P1D19 on a BMW, a diagnostic scan tool capable of reading manufacturer-specific codes is required. The technician will need to access the A/C compressor control module to check the readings from internal temperature sensors ‘A’ and ‘B’. Additionally, a visual inspection of the wiring and connectors associated with the A/C system may be necessary to identify any visible faults.
How to fix DTC P1D19 on BMW
Fixing DTC P1D19 on a BMW typically involves replacing the faulty internal temperature sensor within the electric A/C compressor control module. If wiring issues are detected, repairs or replacements may be necessary. In some cases, reprogramming or replacing the control module itself may be required to resolve the correlation error between sensors ‘A’ and ‘B’.
How to erase DTC P1D19 on BMW
Once the underlying issue causing DTC P1D19 on a BMW has been addressed and fixed, the diagnostic trouble code can be cleared using a diagnostic scan tool. By accessing the vehicle’s onboard computer system, the technician can erase the fault code, resetting the A/C system’s status and allowing for proper monitoring of future operation.
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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