P2559 – BMW DTC

BMW DTC P2559 – Engine Coolant Level Sensor/Switch Circuit High

DTC P2559 meaning on BMW

DTC P2559 on a BMW indicates an issue with the Engine Coolant Level Sensor/Switch Circuit being too high. This means that the engine control module (ECM) has detected a high voltage signal from the coolant level sensor or switch, suggesting a potential problem with the coolant level monitoring system.

BMW DTC P2559 symptoms

Symptoms of DTC P2559 on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Inaccurate coolant level readings on the instrument cluster
• Possible overheating of the engine due to incorrect coolant level monitoring

BMW DTC P2559 causes

The common causes of DTC P2559 on a BMW include:

• Defective engine coolant level sensor or switch
• Wiring issues such as short circuits or open circuits in the coolant level sensor circuit
• Corrosion or poor connections in the coolant level sensor circuit

BMW DTC P2559 seriousness

While DTC P2559 may not directly affect the drivability of the vehicle, it is important to address this issue promptly to ensure proper monitoring of the engine coolant level. Ignoring this fault could potentially lead to overheating and engine damage if the coolant level is not accurately detected.

How to diagnose DTC P2559 on BMW

To diagnose DTC P2559 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the engine coolant level sensor and its wiring for any visible damage or corrosion
3. Perform a continuity test on the sensor circuit to check for any open or short circuits
4. Check the coolant level in the reservoir to ensure it is at the correct level

How to fix DTC P2559 on BMW

To fix DTC P2559 on a BMW, you can try the following solutions:

1. Replace the engine coolant level sensor or switch if it is found to be faulty
2. Repair any damaged wiring or connectors in the coolant level sensor circuit
3. Clear the fault code using a diagnostic scanner after the repair is completed

How to erase DTC P2559 on BMW

To erase DTC P2559 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After addressing the underlying issue causing the fault code, you can reset the ECM by clearing the code to ensure the system recognizes the repair.

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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