BMW DTC P0390 – Camshaft Position Sensor ‘B’ Circuit (Bank 2)
DTC P0390 meaning on BMW
The DTC P0390 code on a BMW indicates a problem with the Camshaft Position Sensor ‘B’ Circuit on Bank 2. This means that the engine control module (ECM) has detected an issue with the signal coming from the camshaft position sensor on the specified bank.
BMW DTC P0390 symptoms
Some common symptoms associated with DTC P0390 on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Engine running rough or misfiring
- Poor fuel economy
- Engine stalling or difficulty starting
BMW DTC P0390 causes
The DTC P0390 code on a BMW can be triggered by various factors, including:
- Faulty camshaft position sensor
- Wiring or connector issues in the camshaft position sensor circuit
- ECM software or hardware problems
BMW DTC P0390 seriousness
While the severity of DTC P0390 may vary depending on the underlying cause, it is important to address this issue promptly to prevent potential engine performance problems and further damage.
How to diagnose DTC P0390 on BMW
Diagnosing DTC P0390 on a BMW typically involves the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the camshaft position sensor and its wiring for any visible damage
- Test the camshaft position sensor using a multimeter
- Check for continuity and proper voltage in the sensor circuit
How to fix DTC P0390 on BMW
To address DTC P0390 on a BMW, you may need to:
- Replace the faulty camshaft position sensor
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Clear the fault code and reset the ECM
How to erase DTC P0390 on BMW
To erase the DTC P0390 code on a BMW, you can use a diagnostic scanner to clear the code from the ECM’s memory. After fixing the underlying issue, clearing the code will reset the Check Engine Light and ensure that the repair was successful.
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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