BMW DTC P2304 – Ignition Coil ‘B’ Primary Control Circuit High
DTC P2304 meaning on BMW
The Diagnostic Trouble Code (DTC) P2304 for BMW indicates an issue with the ignition coil ‘B’ primary control circuit registering a high voltage condition. This fault code is specific to the ignition coil ‘B’ in the engine’s ignition system.
BMW DTC P2304 symptoms
Symptoms associated with DTC P2304 on a BMW may include:
- Engine misfires
- Rough idling
- Loss of power
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P2304 causes
The common causes of DTC P2304 on a BMW are:
- Defective ignition coil ‘B’
- Wiring or connector issues in the ignition coil ‘B’ circuit
- ECU (Engine Control Unit) malfunction
BMW DTC P2304 seriousness
Ignoring DTC P2304 on a BMW can lead to potential engine performance issues and may cause damage to the catalytic converter over time. It is recommended to address this fault code promptly to prevent further complications.
How to diagnose DTC P2304 on BMW
To diagnose DTC P2304 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and further information.
- Inspect the ignition coil ‘B’ and its wiring for any visible damage or loose connections.
- Test the ignition coil ‘B’ using a multimeter to check for proper resistance.
- Check the ECU for any stored codes or malfunctions related to the ignition system.
How to fix DTC P2304 on BMW
To fix DTC P2304 on a BMW, you can perform the following actions:
- Replace the faulty ignition coil ‘B’ with a new one.
- Repair any damaged wiring or connectors in the ignition coil ‘B’ circuit.
- If the ECU is found to be faulty, consider reprogramming or replacing it as necessary.
How to erase DTC P2304 on BMW
To erase DTC P2304 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECU’s memory. After addressing the underlying issue causing the fault code, clearing it from the system will reset the Check Engine Light and ensure proper operation.
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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