BMW DTC P1555 – Air Conditioning Compressor Circuit Intermittent
DTC P1555 meaning on BMW
DTC P1555 on a BMW indicates an intermittent issue with the air conditioning compressor circuit. This fault code is triggered when the Engine Control Module (ECM) detects a problem with the operation of the air conditioning compressor circuit, which may lead to inconsistent performance of the air conditioning system.
BMW DTC P1555 symptoms
Symptoms of DTC P1555 on a BMW may include intermittent or inconsistent cooling from the air conditioning system, unusual noises coming from the compressor, or the air conditioning system not working at all. In some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P1555 causes
The causes of DTC P1555 on a BMW can vary and may include issues such as a faulty air conditioning compressor, damaged wiring or connectors in the compressor circuit, a malfunctioning pressure sensor, or a problem with the ECM itself.
BMW DTC P1555 seriousness
While DTC P1555 is not a critical fault code that affects the drivability of the vehicle, it can lead to discomfort for the occupants if the air conditioning system is not functioning properly. Additionally, prolonged operation with a faulty air conditioning compressor can potentially cause further damage to the system.
How to diagnose DTC P1555 on BMW
To diagnose DTC P1555 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and perform a visual inspection of the air conditioning compressor circuit, checking for any visible damage or loose connections. They may also conduct tests on the compressor and related components to identify the root cause of the issue.
How to fix DTC P1555 on BMW
Fixing DTC P1555 on a BMW involves addressing the underlying cause of the fault. This may include repairing or replacing the air conditioning compressor, repairing damaged wiring or connectors, replacing a faulty pressure sensor, or reprogramming the ECM if necessary. It is recommended to follow the manufacturer’s repair procedures and use genuine parts for a lasting solution.
How to erase DTC P1555 on BMW
Once the underlying issue causing DTC P1555 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. By accessing the ECM through the scanner, the technician can navigate to the fault code menu and select the option to clear the code. After clearing the code, it is advisable to test the air conditioning system to ensure that 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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