OBD Guide
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P1518

Intake Manifold Runner Control Stuck Open

P1518 is an OBD-II diagnostic trouble code meaning: Intake Manifold Runner Control Stuck Open. Common causes: mechanical jamming of the damper, malfunction of the imrc drive (actuator). Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Reduced engine power
  • Unstable idling
  • Dips during acceleration
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Mechanical jamming of the damper
  • Malfunction of the IMRC drive (actuator)
  • Open or short circuit in control circuit
  • Wiring Harness Problems
  • Carbon accumulation on the valves

How to Fix

  1. Visual inspection of dampers and drive mechanism
  2. Checking the electrical control circuit
  3. Testing the operation of the IMRC drive
  4. Cleaning the valves from carbon deposits if necessary
  5. Replacement of faulty components (drive, dampers)

Related codes

P1516P1517P1519

Error P1518 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCLincolnMercuryOldsmobileSaturnSubaruVolkswagen

FAQ

What does the P1518 code mean?

P1518 is an OBD-II diagnostic trouble code that indicates: Intake Manifold Runner Control Stuck Open

What causes a P1518 error code?

The most common causes of P1518 include: Mechanical jamming of the damper; Malfunction of the IMRC drive (actuator); Open or short circuit in control circuit; Wiring Harness Problems.

How do I fix a P1518 diagnostic trouble code?

To fix P1518: Visual inspection of dampers and drive mechanism. Checking the electrical control circuit. Testing the operation of the IMRC drive. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1518?

Limited driving only, diagnose soon

How much does it cost to fix P1518?

The estimated repair cost for P1518 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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