P3401

Cylinder 1 Deactivation/Intake Valve Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Engine transition to emergency mode
Reduced engine power
Increased fuel consumption
Unstable engine operation

Causes

Broken wire in the control circuit
Solenoid valve malfunction
Short circuit in the circuit
Problems with the engine control unit
Oxidation of contacts

How to Fix

Check the integrity of wiring and connectors
Test solenoid valve resistance
Check voltage on control circuit
Inspect the engine control unit for damage
If necessary, replace faulty components

Related codes

P3400 P3402 P3403