BMW DTC P3108 – Cylinder 3 High Pressure Injector Low Side Circuit Open
DTC P3108 meaning on BMW
The Diagnostic Trouble Code (DTC) P3108 for BMW indicates an issue with the Cylinder 3 High Pressure Injector Low Side Circuit being open. This means that there is a problem with the electrical circuit that controls the high-pressure fuel injector for cylinder 3 in the engine.
BMW DTC P3108 symptoms
Symptoms of DTC P3108 on a BMW may include:
- Engine misfires
- Loss of power
- Rough idling
- Decreased fuel efficiency
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P3108 causes
The possible causes of DTC P3108 on a BMW include:
- Faulty high-pressure fuel injector
- Open or short circuit in the wiring harness
- Corrosion or poor connection in the injector circuit
- ECU (Engine Control Unit) malfunction
BMW DTC P3108 seriousness
Ignoring DTC P3108 on a BMW can lead to potential engine performance issues and may cause further damage to the engine over time. It is important to address this issue promptly to prevent any long-term consequences.
How to diagnose DTC P3108 on BMW
To diagnose DTC P3108 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the ECU.
- Inspect the wiring harness connected to the high-pressure injector for any visible damage or corrosion.
- Check the resistance of the high-pressure injector using a multimeter to determine if it is faulty.
- Perform a continuity test on the injector circuit to identify any open or short circuits.
- If necessary, test the ECU to ensure it is functioning correctly.
How to fix DTC P3108 on BMW
To fix DTC P3108 on a BMW, you can take the following steps:
- Replace the faulty high-pressure fuel injector for cylinder 3.
- Repair or replace any damaged wiring in the injector circuit.
- Clean any corrosion or poor connections in the circuit.
- If the ECU is found to be faulty, it may need to be repaired or replaced by a professional.
How to erase DTC P3108 on BMW
To erase DTC P3108 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECU. Once the issue has been addressed and fixed, you can reset the codes to turn off the Check Engine Light and ensure 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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