Skip to main content

P1531 – Intake Manifold Runner Control Stuck Open

Want to confirm the real cause of this fault code?

A high‑quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze‑frame information — exactly what you need to verify the root cause of this code with confidence.

View Recommended Scanners

Symptoms

  • Hesitation
  • Poor low‑RPM torque

Causes

  • Carbon buildup
  • Broken actuator
  • Vacuum leak

Diagnosis

  • Inspect IMRC actuator
  • Check vacuum lines
  • Inspect linkage

Repair

  • Clean IMRC
  • Replace actuator
  • Repair vacuum leaks
Hit enter to search or ESC to close