BMW DTC P3443 – Cylinder 6 Deactivation/Intake Valve Control Circuit Low
DTC P3443 meaning on BMW
The Diagnostic Trouble Code (DTC) P3443 for BMW indicates an issue with the Cylinder 6 Deactivation/Intake Valve Control Circuit being detected as low. This code is specific to BMW vehicles and is related to the operation of the cylinder deactivation system, which helps improve fuel efficiency by deactivating specific cylinders under certain driving conditions.
BMW DTC P3443 symptoms
Symptoms of DTC P3443 on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Reduced engine performance or power
- Engine misfires or rough idling
- Decreased fuel efficiency
BMW DTC P3443 causes
The common causes of DTC P3443 on a BMW include:
- Faulty cylinder deactivation solenoid
- Wiring issues in the intake valve control circuit
- Defective engine control module (ECM)
- Mechanical issues with the intake valve or cylinder 6
BMW DTC P3443 seriousness
While DTC P3443 may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential long-term damage to the engine and ensure optimal performance and fuel efficiency of the vehicle.
How to diagnose DTC P3443 on BMW
To diagnose DTC P3443 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 and connectors in the intake valve control circuit
- Test the cylinder deactivation solenoid for proper operation
- Check the intake valve and cylinder 6 for any mechanical issues
- Verify the functionality of the ECM
How to fix DTC P3443 on BMW
Depending on the root cause of DTC P3443, the following steps may be taken to fix the issue on a BMW:
- Replace the faulty cylinder deactivation solenoid
- Repair or replace damaged wiring in the intake valve control circuit
- Address any mechanical issues with the intake valve or cylinder 6
- If necessary, replace the engine control module (ECM)
How to erase DTC P3443 on BMW
After the underlying issue causing DTC P3443 has been resolved, the fault code can be cleared from the BMW’s ECM using a diagnostic scanner. This process typically involves accessing the vehicle’s onboard diagnostics system and selecting the option to clear the stored fault 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
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