Intake Manifold Air Control Solenoid

What this code means

The PCM has detected a malfunction in the intake manifold air control solenoid. This solenoid controls an intake manifold runner valve that optimizes airflow for different engine speed ranges.

Symptoms

• Check Engine Light
• Slight reduction in performance at certain RPMs
• Minor loss of low-end or high-end torque

Common causes

• Faulty intake manifold air control solenoid
• Wiring issue to solenoid
• Carbon buildup on runner valve
• Vacuum leak at actuator
• Solenoid connector corrosion

Diagnostic steps

1. Test solenoid resistance
2. Command solenoid with scan tool and verify operation
3. Inspect solenoid wiring and connector
4. Check runner valve for free movement
5. Inspect vacuum supply if vacuum-actuated

Repair notes

Replace the intake manifold air control solenoid or clean the runner valve if stuck.

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