BMW DTC P0358 – Ignition Coil ‘H’ Primary Control Circuit/Open
DTC P0358 meaning on BMW
DTC P0358 for BMW indicates a problem with the ignition coil ‘H’ primary control circuit. This fault code is triggered when the Engine Control Module (ECM) detects an open circuit in the primary control circuit of the ignition coil ‘H’. The ECM monitors the primary control circuit to ensure proper ignition coil operation.
BMW DTC P0358 symptoms
Symptoms of DTC P0358 on a BMW may include:
- Engine misfires
- Rough idling
- Lack of power
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P0358 causes
The common causes of DTC P0358 on a BMW are:
- Defective ignition coil ‘H’
- Open or short circuit in the wiring harness connected to the ignition coil ‘H’
- Faulty Engine Control Module (ECM)
BMW DTC P0358 seriousness
Ignoring DTC P0358 on a BMW can lead to potential engine performance issues, such as misfires and reduced fuel efficiency. It is important to address this fault code promptly to prevent further damage to the engine components.
How to diagnose DTC P0358 on BMW
To diagnose DTC P0358 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the wiring harness connected to the ignition coil ‘H’ for any signs of damage or corrosion.
- Test the ignition coil ‘H’ for proper resistance and continuity.
- Check the ECM for any signs of malfunction.
How to fix DTC P0358 on BMW
To fix DTC P0358 on a BMW, consider the following steps:
- Replace the faulty ignition coil ‘H’ with a new one.
- Repair any open or short circuits in the wiring harness connected to the ignition coil ‘H’.
- If the ECM is faulty, replace it with a new or remanufactured unit.
How to erase DTC P0358 on BMW
To erase DTC P0358 on a BMW, use a diagnostic scanner to clear the fault codes stored in the ECM. After fixing the underlying issue that caused the fault code, clearing the codes will reset the Check Engine Light and ensure that the system is operating properly.
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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