P349F

Cylinder 8 Deactivation/Intake Valve Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Floating engine speed
Reduced engine power
Increased fuel consumption
Uneven engine operation
Check Engine Light Illuminates

Causes

Malfunction of the cylinder deactivation solenoid valve
Mechanical damage to the intake valve
Problems with the electrical control circuit
The deactivation mechanism is dirty or jammed
Engine control unit software error

How to Fix

Check the condition of the cylinder deactivation solenoid valve
Diagnose the valve control mechanism of cylinder 8
Check electrical harness and connections
Adapt the valve control system
If necessary, replace faulty components

Related codes

P3497 P349E P3500