P0370 – BMW DTC

BMW DTC P0370 – Timing Reference High Resolution Signal ‘A’

DTC P0370 meaning on BMW

DTC P0370 on a BMW refers to the Timing Reference High Resolution Signal ‘A’ malfunction. This diagnostic trouble code indicates that there is an issue with the high-resolution signal from the engine’s timing reference sensor ‘A’.

BMW DTC P0370 symptoms

Symptoms of DTC P0370 on a BMW may include:

• Engine misfires
• Rough idling
• Decreased engine performance
• Difficulty starting the engine
• Illuminated check engine light

BMW DTC P0370 causes

Common causes of DTC P0370 on a BMW include:

• Defective timing reference sensor ‘A’
• Wiring or connector issues in the timing reference sensor circuit
• Engine control module (ECM) failure
• Timing chain or belt problems

BMW DTC P0370 seriousness

DTC P0370 is a serious issue that should not be ignored. Ignoring this fault code can lead to potential engine damage, poor performance, and increased fuel consumption. It is recommended to address this problem promptly to prevent further complications.

How to diagnose DTC P0370 on BMW

To diagnose DTC P0370 on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
2. Inspect the wiring and connectors related to the timing reference sensor ‘A’ for any damage or corrosion.
3. Test the timing reference sensor ‘A’ using a multimeter to check for proper resistance and signal output.
4. Check the timing chain or belt for any wear or damage that could affect the sensor’s operation.

How to fix DTC P0370 on BMW

To fix DTC P0370 on a BMW, consider the following:

1. Replace the faulty timing reference sensor ‘A’ if it is found to be defective.
2. Repair or replace any damaged wiring or connectors in the sensor circuit.
3. If the ECM is determined to be faulty, replace it with a new one and program it accordingly.
4. Ensure the timing chain or belt is in good condition and properly aligned.

How to erase DTC P0370 on BMW

To erase DTC P0370 on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault codes stored in the ECM.
2. After clearing the codes, start the engine and ensure the check engine light is no longer illuminated.
3. Perform a test drive to verify that the issue has been resolved and the fault code does not return.

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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