BMW DTC P0355 – Ignition Coil ‘E’ Primary Control Circuit/Open
DTC P0355 meaning on BMW
The Diagnostic Trouble Code (DTC) P0355 for BMW indicates a malfunction in the ignition coil ‘E’ primary control circuit. This means that the Engine Control Module (ECM) has detected an open circuit or a lack of continuity in the primary control circuit of the ignition coil ‘E’.
BMW DTC P0355 symptoms
Symptoms of DTC P0355 on a BMW may include:
- Engine misfires
- Rough idling
- Lack of power
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P0355 causes
The common causes of DTC P0355 on a BMW are:
- Defective ignition coil ‘E’
- Open or short circuit in the wiring harness connected to the ignition coil ‘E’
- Faulty Engine Control Module (ECM)
BMW DTC P0355 seriousness
Ignoring DTC P0355 on a BMW can lead to potential engine performance issues, such as misfires and reduced fuel efficiency. It is recommended to address this issue promptly to prevent further damage to the vehicle.
How to diagnose DTC P0355 on BMW
To diagnose DTC P0355 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the wiring harness connected to the ignition coil ‘E’ for any visible damage or loose connections
- Test the ignition coil ‘E’ for proper resistance and continuity
- Check the ECM for any stored codes related to the ignition system
How to fix DTC P0355 on BMW
To fix DTC P0355 on a BMW, you can perform the following steps:
- Replace the faulty ignition coil ‘E’ with a new one
- Repair any open or short circuits in the wiring harness connected to the ignition coil ‘E’
- If necessary, replace the Engine Control Module (ECM)
How to erase DTC P0355 on BMW
To erase DTC P0355 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. Once the issue has been resolved and the fault code erased, the Check Engine Light should turn off.
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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