BMW DTC P3490 – Cylinder 12 Deactivation/Intake Valve Control Circuit Performance
DTC P3490 meaning on BMW
The Diagnostic Trouble Code (DTC) P3490 for BMW indicates an issue with the Cylinder 12 Deactivation/Intake Valve Control Circuit Performance. This means that there is a problem with the control circuit responsible for deactivating cylinder 12 or controlling the intake valve in the engine.
BMW DTC P3490 symptoms
Symptoms of DTC P3490 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance or power
- Engine misfires or rough idling
- Decreased fuel efficiency
BMW DTC P3490 causes
Common causes of DTC P3490 on a BMW include:
- Faulty cylinder deactivation solenoid
- Wiring or connector issues in the control circuit
- Defective intake valve control module
- Engine mechanical problems
BMW DTC P3490 seriousness
The seriousness of DTC P3490 on a BMW depends on the underlying cause. Ignoring this issue can lead to further engine damage, reduced fuel efficiency, and potential drivability issues. It is recommended to address this code promptly to prevent more severe problems.
How to diagnose DTC P3490 on BMW
To diagnose DTC P3490 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the cylinder deactivation solenoid and related wiring for any visible damage
- Check the intake valve control module for proper operation
- Perform a thorough inspection of the engine components related to cylinder 12 deactivation
How to fix DTC P3490 on BMW
To fix DTC P3490 on a BMW, you can consider the following actions:
- Replace the faulty cylinder deactivation solenoid
- Repair or replace any damaged wiring or connectors in the control circuit
- Replace the defective intake valve control module
- Address any underlying engine mechanical issues
How to erase DTC P3490 on BMW
To erase DTC P3490 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s memory. After addressing the root cause of the issue and making necessary repairs, you can reset the code to see if the problem has been resolved successfully.
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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