Intake Manifold Short Runner Solenoid Circuit

What this code means

The PCM has detected a malfunction in the intake manifold short runner solenoid valve circuit. This solenoid controls the short runner valve position to optimize airflow at different engine speeds for improved torque and efficiency.

Symptoms

• Check Engine Light
• Reduced mid-range torque
• Slight hesitation on acceleration
• Minor fuel economy decrease

Common causes

• Faulty short runner solenoid valve
• Wiring open or short to solenoid
• Corroded solenoid connector
• Carbon buildup on runner valve preventing movement
• Vacuum leak at solenoid actuator

Diagnostic steps

1. Test solenoid resistance with multimeter
2. Command solenoid on and off with scan tool and listen for click
3. Inspect solenoid wiring and connector
4. Check vacuum supply to runner valve actuator
5. Inspect runner valve for carbon buildup or binding

Repair notes

Replace the short runner solenoid valve if electrically faulty; clean carbon from runner valve if mechanically stuck.

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