BMW DTC P1807 – Engine Desired Idle Speed Implausible CAN Signal
DTC P1807 meaning on BMW
The Diagnostic Trouble Code (DTC) P1807 on a BMW indicates that there is an issue with the Engine Desired Idle Speed Implausible CAN Signal. This means that the Engine Control Module (ECM) is receiving a signal related to the desired idle speed of the engine that is not within the expected range or is inconsistent with other signals being received.
BMW DTC P1807 symptoms
Symptoms of the BMW DTC P1807 may include:
- Fluctuating idle speed
- Poor engine performance at idle
- Check Engine Light (CEL) illuminated on the dashboard
- Engine stalling or rough idling
BMW DTC P1807 causes
Possible causes of the BMW DTC P1807 include:
- Issues with the idle control system
- Malfunctioning Engine Control Module (ECM)
- Wiring or connection problems in the CAN communication network
- Faulty sensors related to engine speed and idle control
BMW DTC P1807 seriousness
The seriousness of the BMW DTC P1807 code lies in the potential for engine performance issues and the risk of stalling, especially at idle. Ignoring this code can lead to further damage to engine components and may result in unsafe driving conditions.
How to diagnose DTC P1807 on BMW
To diagnose the DTC P1807 on a BMW, you can:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the idle control system components for any visible damage or loose connections
- Check the wiring and connectors in the CAN communication network for any issues
- Perform a thorough inspection of sensors related to engine speed and idle control
How to fix DTC P1807 on BMW
To fix the DTC P1807 on a BMW, you may need to:
- Repair or replace any faulty components in the idle control system
- Address any issues with the Engine Control Module (ECM) if necessary
- Repair or replace damaged wiring or connectors in the CAN communication network
- Replace any sensors related to engine speed and idle control that are found to be faulty
How to erase DTC P1807 on BMW
To erase the DTC P1807 on a BMW, you can:
- Use a diagnostic scanner to clear the fault codes from the ECM memory
- After fixing the underlying issue, perform a test drive to ensure the code does not return
- If the issue persists, further diagnosis may be required to address any remaining problems
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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