BMW DTC P037E – Glow Plug Sense Circuit Low
DTC P037E meaning on BMW
The DTC P037E fault code on a BMW indicates an issue with the glow plug sense circuit being detected as low. Glow plugs are used in diesel engines to help with cold starts by heating the combustion chamber. The glow plug sense circuit monitors the operation of the glow plugs and reports any abnormalities to the engine control module (ECM).
BMW DTC P037E symptoms
Symptoms of a DTC P037E on a BMW may include:
- Difficulty starting the engine, especially in cold weather
- Engine misfires or rough idling
- Decreased fuel efficiency
- Illuminated check engine light
BMW DTC P037E causes
Common causes of a DTC P037E on a BMW include:
- Faulty glow plugs
- Wiring issues in the glow plug circuit
- Defective glow plug control module
- ECM software issues
BMW DTC P037E seriousness
Ignoring a DTC P037E on a BMW can lead to starting issues, reduced engine performance, and potential damage to the engine over time. It is important to address this fault code promptly to prevent further complications.
How to diagnose DTC P037E on BMW
To diagnose a DTC P037E on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the glow plugs and wiring for any visible damage
- Test the glow plug circuit for continuity and proper voltage
- Check the glow plug control module for proper operation
- Verify the ECM software is up to date
How to fix DTC P037E on BMW
Depending on the root cause of the DTC P037E, fixing the issue on a BMW may involve:
- Replacing faulty glow plugs
- Repairing or replacing damaged wiring in the glow plug circuit
- Replacing the glow plug control module if defective
- Updating the ECM software to the latest version
How to erase DTC P037E on BMW
After fixing the underlying issue causing the DTC P037E on a BMW, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and allow the vehicle’s ECM to monitor the system for any new faults.
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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