P3403

Cylinder 1 Deactivation/Intake Valve Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–67 (est.)

Symptoms

Check engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine idling
The engine goes into emergency mode

Causes

Open or short circuit in valve control circuit
VVT solenoid valve malfunction
Wiring Harness Problems
Engine control unit (ECU) malfunction
Poor contact in control circuit connectors

How to Fix

Check valve control circuit integrity
Check the condition of connectors and contacts
Test VVT solenoid valve
Check power and ground circuit
If necessary, replace the faulty valve or wiring harness.

Related codes

P3400 P3401 P3402