P349B

Cylinder 4 Deactivation/Intake Valve Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Power reduction
Check Engine Light Illuminates
Vibrations at idle

Causes

Malfunction of the cylinder deactivation solenoid valve
Mechanical damage to the intake valve
Wiring Harness Problems
Engine control unit malfunction
The deactivation mechanism is dirty or jammed

How to Fix

Check the condition of the deactivation solenoid valve
Inspect the intake valve mechanism for damage
Check the integrity of the wiring harness and contacts
Test the operation of the engine control unit
Clean or replace the deactivation mechanism if necessary

Related codes

P349A P349C P349D