BMW DTC P3304 – Ignition Coil Cylinder 5 Contact Resistance or High-Impedance
DTC P3304 meaning on BMW
DTC P3304 on a BMW indicates an issue with the ignition coil in cylinder 5. Specifically, it points to a problem with the contact resistance or high impedance in the ignition coil for that particular cylinder.
BMW DTC P3304 symptoms
Symptoms of DTC P3304 on a BMW may include rough idling, misfiring, loss of power, and potentially even stalling of the engine. The Check Engine Light may also illuminate on the dashboard.
BMW DTC P3304 causes
The most common causes of DTC P3304 on a BMW are a faulty ignition coil in cylinder 5, poor electrical connections, or wiring issues related to the ignition system.
BMW DTC P3304 seriousness
Ignoring DTC P3304 on a BMW can lead to further engine performance issues, reduced fuel efficiency, and potential damage to the catalytic converter. It is important to address this issue promptly.
How to diagnose DTC P3304 on BMW
To diagnose DTC P3304 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the ignition coil in cylinder 5. They may also test the coil for proper resistance and check the wiring for any signs of damage.
How to fix DTC P3304 on BMW
The most common fix for DTC P3304 on a BMW is to replace the ignition coil in cylinder 5. It is also important to ensure that all electrical connections related to the ignition system are secure and free of corrosion. Once the faulty component is replaced, the vehicle should be tested to ensure the issue has been resolved.
How to erase DTC P3304 on BMW
After fixing the underlying issue causing DTC P3304 on a BMW, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s memory and turn off the Check Engine Light. It is important to verify that the issue has been resolved before clearing the code.
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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