Engine-CodesMercury – P151A Mercury

P151A Mercury Code - Intake Manifold Runner Controller Performance

Quick Answer

The P151A diagnostic trouble code (DTC) for Mercury vehicles specifically indicates an issue with the Intake Manifold Runner Controller (IMRC) performance. Common causes include Faulty IMRC actuator, Wiring or electrical issues, Vacuum leak in the IMRC system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P151A Mercury indicates Intake Manifold Runner Controller Performance.
Common causes
Common causes include Faulty IMRC actuator, Wiring or electrical issues, Vacuum leak in the IMRC system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P151A Mercury Description

The P151A diagnostic trouble code (DTC) for Mercury vehicles specifically indicates an issue with the Intake Manifold Runner Controller (IMRC) performance. The IMRC is a component of the intake manifold system that controls the length of the intake runners, which helps optimize airflow into the engine based on driving conditions. This code suggests that there is a malfunction in the IMRC system, potentially leading to reduced engine performance, efficiency, and overall drivability.

OBDII Code P151A Mercury - Intake Manifold Runner Controller Performance
P151A Mercury Code - Intake Manifold Runner Controller Performance

Common Causes of P151A Mercury

  1. Faulty IMRC actuator
  2. Wiring or electrical issues
  3. Vacuum leak in the IMRC system
  4. Carbon buildup in the intake manifold
  5. Defective IMRC control module

Symptoms of P151A Mercury

  1. Reduced engine power
  2. Rough idling or stalling
  3. Poor acceleration
  4. Decreased fuel efficiency
  5. Limp mode activation

How to Fix P151A Mercury

  1. Begin by diagnosing the specific cause of the P151A code using a scan tool to pinpoint the issue.
  2. Inspect the IMRC actuator and related wiring for any signs of damage or malfunction.
  3. Check for vacuum leaks in the IMRC system and repair or replace any faulty components.
  4. Clean out any carbon buildup in the intake manifold that may be affecting IMRC operation.
  5. If necessary, replace the IMRC actuator or control module to resolve the issue.

Cost to Fix P151A Mercury

The cost of repairing the P151A code on a Mercury vehicle can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of parts for this repair can range from $200 to $500, while labor costs can add an additional $100 to $300. Overall, you can expect the total repair bill to be anywhere from $300 to $800. It's important to note that these estimates are rough figures and actual costs may differ based on individual circumstances.

Tech Notes for P151A Mercury

There is a Factory Service Bulletin for the 2006 Mercury Mountaineer:
2006 Mercury Mountaineer Factory Service Bulletin OBDII Code P151A

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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