U0605 – BMW DTC

BMW DTC U0605 – Lost communication with A/C Refrigerant Sensor ‘A’

DTC U0605 meaning on BMW

DTC U0605 on a BMW indicates a communication error with the A/C refrigerant sensor ‘A’. This fault code is triggered when the Engine Control Module (ECM) or Body Control Module (BCM) is unable to establish communication with the A/C refrigerant sensor ‘A’. The A/C refrigerant sensor ‘A’ is responsible for monitoring the refrigerant pressure in the air conditioning system.

BMW DTC U0605 symptoms

Symptoms of DTC U0605 on a BMW may include:

• Malfunction indicator lamp (MIL) or check engine light illuminated on the dashboard
• Issues with the air conditioning system
• Loss of communication with the A/C refrigerant sensor ‘A’

BMW DTC U0605 causes

Possible causes of DTC U0605 on a BMW include:

• Faulty A/C refrigerant sensor ‘A’
• Wiring or connection issues between the sensor and the ECM/BCM
• ECM/BCM software or hardware problems

BMW DTC U0605 seriousness

While DTC U0605 may not directly affect the drivability of the vehicle, it can lead to issues with the air conditioning system. It is important to address this fault code to ensure proper functioning of the A/C system and to prevent potential future problems.

How to diagnose DTC U0605 on BMW

To diagnose DTC U0605 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scan tool to retrieve the fault code and freeze frame data
2. Inspect the wiring and connections related to the A/C refrigerant sensor ‘A’
3. Check the sensor for proper operation and signal output
4. Verify communication between the sensor and the ECM/BCM

How to fix DTC U0605 on BMW

To fix DTC U0605 on a BMW, the following steps may be taken:

1. Replace the faulty A/C refrigerant sensor ‘A’ if necessary
2. Repair any damaged wiring or connections
3. Update the ECM/BCM software if required

How to erase DTC U0605 on BMW

To erase DTC U0605 on a BMW, a mechanic can use a diagnostic scan tool to clear the fault code from the vehicle’s memory. After addressing the underlying issue and making the necessary repairs, the fault code can be erased to reset the system and turn off the check engine light.

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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