BMW DTC P139E – Timing Reference High Resolution Signal ‘A’ during Start
DTC P139E meaning on BMW
The DTC P139E error code on BMW vehicles indicates an issue with the Timing Reference High Resolution Signal ‘A’ during Start. This fault code is related to the engine’s timing reference signal, which is crucial for proper engine operation and performance.
BMW DTC P139E symptoms
Symptoms of the DTC P139E error code on BMW may include:
- Engine misfires
- Rough idling
- Reduced engine performance
- Difficulty starting the engine
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P139E causes
Common causes of the DTC P139E error code on BMW vehicles include:
- Faulty timing reference sensor
- Wiring or connection issues related to the timing reference signal
- Engine control module (ECM) software issues
- Timing chain or belt problems
BMW DTC P139E seriousness
The DTC P139E error code should be addressed promptly to prevent potential engine performance issues and further damage. Ignoring this fault code may lead to more severe engine problems and increased repair costs.
How to diagnose DTC P139E on BMW
To diagnose the DTC P139E error code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the timing reference sensor and its wiring for any visible damage or corrosion
- Check the timing chain or belt for proper alignment and tension
- Perform a visual inspection of the engine control module (ECM) connections
How to fix DTC P139E on BMW
To fix the DTC P139E error code on a BMW, the following steps may be taken:
- Replace the faulty timing reference sensor if necessary
- Repair or replace any damaged wiring or connections related to the timing reference signal
- Update the engine control module (ECM) software to the latest version
- Inspect and, if needed, replace the timing chain or belt
How to erase DTC P139E on BMW
After fixing the underlying issue causing the DTC P139E error code on a BMW, the fault code can be erased using a diagnostic scanner. By clearing the code, the Check Engine Light (CEL) should turn off, indicating that the problem has been resolved.
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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