P341C

Deactivation/Exhaust Valve Control Circuit Performance Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation at idle
Reduced engine power
Check Engine light comes on
Cylinder deactivation system does not work

Causes

Open or short circuit in control circuit
Deactivation solenoid valve malfunction
Problems with the engine control unit
Mechanical failure of the cylinder deactivation system
Poor contact in connectors

How to Fix

Check the integrity of the wiring harness to the deactivation valve
Check the resistance and operation of the solenoid valve
Inspect connectors for oxidation or damage
Check relevant fuses
If necessary, replace the cylinder deactivation valve

Related codes

P341D P3420 P3400