P2351 moderate

Intake Manifold Runner Control Position Sensor/Switch Circuit

The P2351 code means the vehicle's onboard diagnostic system has detected: Intake Manifold Runner Control Position Sensor/Switch Circuit. This is a moderate severity code.

My Garage →
Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$200 - $500 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Reduced engine power at higher RPMs
  • Rough idle or slight hesitation
  • Whistling or vacuum leak sound from intake area
  • Decreased fuel efficiency

Probable Causes (Ranked by Likelihood)

  • Faulty intake manifold runner position sensor Very High
  • Wiring issue in position sensor circuit High
  • Runner flap not moving to expected position Moderate
  • PCM/ECM malfunction Low

Step-by-Step Diagnostic Procedure

  1. Read and document freeze frame data for P2351

  2. Inspect intake manifold runner flaps for free movement and carbon buildup

  3. Test runner control actuator operation with a scan tool bi-directional test

  4. Check wiring continuity and connector condition for the runner control circuit

Frequently Asked Questions

What does P2351 mean?

P2351 indicates a problem with the intake manifold runner control system: Intake Manifold Runner Control Position Sensor/Switch Circuit. This system optimizes airflow into the engine at different RPM ranges.

Can I drive with P2351?

You can drive short distances. The engine may feel less responsive at certain RPMs but is generally safe for short trips. Schedule a repair to restore full performance.

How much does it cost to fix P2351?

Repair costs range from $200 to $500 depending on whether the actuator, sensor, or manifold runner assembly needs replacement.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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