BMW DTC P3427 – Cylinder 4 Deactivation/Intake Valve Control Circuit Low
DTC P3427 meaning on BMW
The Diagnostic Trouble Code (DTC) P3427 for BMW indicates an issue with the Cylinder 4 Deactivation/Intake Valve Control Circuit being detected as low. This means that there is a problem with the electrical circuit responsible for controlling the deactivation or activation of the intake valve in cylinder 4 of the engine.
BMW DTC P3427 symptoms
Symptoms of DTC P3427 on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Engine running rough or misfiring
- Reduced engine performance or power
- In some cases, the engine may go into a limp mode
BMW DTC P3427 causes
The common causes of DTC P3427 on a BMW include:
- Faulty intake valve control solenoid
- Wiring issues or poor connections in the intake valve control circuit
- Defective Engine Control Module (ECM)
- Mechanical issues with the intake valve itself
BMW DTC P3427 seriousness
Ignoring DTC P3427 on a BMW can lead to potential engine performance issues and may cause further damage if left unresolved. It is recommended to address this issue promptly to prevent any long-term problems with the engine.
How to diagnose DTC P3427 on BMW
To diagnose DTC P3427 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 intake valve control solenoid and wiring for any visible damage or corrosion
- Test the intake valve control circuit for proper voltage and continuity
- Check the ECM for any stored codes or malfunctions
How to fix DTC P3427 on BMW
To fix DTC P3427 on a BMW, the following steps may be taken:
- Replace the faulty intake valve control solenoid if necessary
- Repair any damaged wiring or connections in the intake valve control circuit
- If the ECM is found to be defective, it may need to be replaced or reprogrammed
- Ensure the intake valve is functioning properly and address any mechanical issues if needed
How to erase DTC P3427 on BMW
After the issue causing DTC P3427 on a BMW has been resolved, the fault code can be erased using a diagnostic scanner. This will clear the code from the ECM’s memory and turn off the Check Engine Light. It is important to verify that the repair was successful by driving the vehicle and rescanning for any remaining codes.
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.