BMW DTC P3477 – Cylinder 10 Exhaust Valve Control Circuit/Open
DTC P3477 meaning on BMW
DTC P3477 on a BMW indicates a fault with the Cylinder 10 Exhaust Valve Control Circuit, specifically an open circuit. This means that the Engine Control Module (ECM) has detected a lack of continuity or a break in the electrical circuit controlling the exhaust valve in cylinder 10.
BMW DTC P3477 symptoms
Symptoms of DTC P3477 on a BMW may include:
- Check Engine Light illuminated
- Engine running rough or misfiring
- Reduced engine performance
- Increased fuel consumption
BMW DTC P3477 causes
Common causes of DTC P3477 on a BMW include:
- Faulty exhaust valve control solenoid
- Open or short circuit in the wiring harness
- Faulty Engine Control Module (ECM)
- Mechanical issue with the exhaust valve
BMW DTC P3477 seriousness
DTC P3477 should be addressed promptly as it can lead to engine performance issues and potential damage if left unresolved. Ignoring this fault may result in further complications and increased repair costs.
How to diagnose DTC P3477 on BMW
To diagnose DTC P3477 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the wiring harness for any visible damage or breaks
- Test the exhaust valve control solenoid for proper operation
- Check the ECM for any stored codes or malfunctions
How to fix DTC P3477 on BMW
To fix DTC P3477 on a BMW, the following steps may be taken:
- Replace the faulty exhaust valve control solenoid
- Repair any open or short circuits in the wiring harness
- If necessary, replace the Engine Control Module (ECM)
- Ensure proper functioning of the exhaust valve
How to erase DTC P3477 on BMW
To erase DTC P3477 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been completed, the code can be erased to reset the Check Engine Light and monitor the system for any recurring issues.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.