P3408

Cylinder 1 Exhaust Valve Control Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine idling
Possible misfire in the first cylinder

Causes

Open or short circuit in control circuit
Damaged connectors or corroded contacts
Control solenoid valve malfunction
Problems with the engine control unit (ECU)
Mechanical failure of exhaust valve

How to Fix

Check the integrity of the wiring harness and connectors
Measure the resistance of the control circuit
Check the operation of the solenoid valve
Scan the control unit for additional errors
If necessary, replace faulty components

Related codes

P34000 P3401 P3409