P1004

Short Runner Valve Control Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

Symptoms

Reduced engine power
Unstable idling
Check Engine Light Illuminates
Deterioration in acceleration dynamics
Dips when pressing the gas pedal

Causes

Short channel control valve malfunction
Open or short circuit in control circuit
ECU software error
Mechanical valve jamming
Problems with power or circuit ground

How to Fix

Check the condition of the short channel control valve
Test the control circuit for open and short circuit
Check connections and connector contacts
Test the valve operation forcibly
Replace valve if necessary

Related codes

P1005 P1003 P1006