BMW DTC P3479 – Cylinder 10 Exhaust Valve Control Circuit Low
DTC P3479 meaning on BMW
DTC P3479 on a BMW indicates a fault with the Cylinder 10 Exhaust Valve Control Circuit. This fault code specifically points to a low voltage condition in the control circuit of the exhaust valve for cylinder 10.
BMW DTC P3479 symptoms
Symptoms of DTC P3479 on a BMW may include:
- Check Engine Light illuminated
- Engine running rough
- Reduced engine performance
- Increased fuel consumption
BMW DTC P3479 causes
Common causes of DTC P3479 on a BMW include:
- Faulty exhaust valve control solenoid
- Wiring issues in the exhaust valve control circuit
- ECU (Engine Control Unit) malfunction
BMW DTC P3479 seriousness
DTC P3479 should be addressed promptly as it can lead to poor engine performance and potentially cause damage to the engine if left unresolved. Ignoring this fault code may result in increased fuel consumption and emissions.
How to diagnose DTC P3479 on BMW
To diagnose DTC P3479 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data.
- Inspect the wiring harness and connectors related to the exhaust valve control circuit for any damage or corrosion.
- Test the exhaust valve control solenoid for proper operation.
- Check the ECU for any stored fault codes or malfunctions.
How to fix DTC P3479 on BMW
To fix DTC P3479 on a BMW, consider the following:
- Replace the faulty exhaust valve control solenoid if necessary.
- Repair any damaged wiring or connectors in the exhaust valve control circuit.
- If the ECU is found to be faulty, it may need to be reprogrammed or replaced.
How to erase DTC P3479 on BMW
To erase DTC P3479 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECU’s memory. After fixing the underlying issue, clearing the code will reset the Check Engine Light and ensure the fault is no longer present.
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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