P34A0

Cylinder 9 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
Uneven engine operation
Reduced engine power
Check engine light comes on
Vibrations at idle

Causes

Cylinder deactivation solenoid malfunction
Problems with hydraulic tappets
Open or short circuit in control circuit
Mechanical wear of the intake valve
Engine control unit malfunctions

How to Fix

Check the condition of the deactivation solenoid
Diagnose the control circuit for breaks and short circuits
Check hydraulic tappets for leaks
Inspect the mechanical condition of the intake valve
If necessary, replace faulty components

Related codes

P34A1 P34A2 P34A3