P3402

Cylinder 1 Deactivation/Intake Valve Control Circuit Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Reduced engine power
Check Engine Light Illuminates
Misfire in cylinder 1

Causes

Open or short circuit in control circuit
Control solenoid valve malfunction
Wiring Harness Problems
Engine control unit malfunction
Mechanical damage to the intake valve

How to Fix

Check the control circuit for opens and short circuits
Check the operation of the control solenoid valve
Inspect the wiring harness for damage
Check the operation of the engine control unit
Check the mechanical condition of the intake valve

Related codes

P3400 P3401 P3403