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Engine-Codes – Generic – P2279

P2279 Code - Intake Air System Leak

Quick Answer

The P2279 diagnostic trouble code (DTC) indicates that there is an intake air system leak in the vehicle. Common causes include Loose or damaged intake air hoses, Faulty intake manifold gasket, Cracked or damaged intake manifold. 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
P2279 indicates Intake Air System Leak.
Common causes
Common causes include Loose or damaged intake air hoses, Faulty intake manifold gasket, Cracked or damaged intake manifold.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P2279 Description

The P2279 diagnostic trouble code (DTC) indicates that there is an intake air system leak in the vehicle. This means that there is a problem with the air entering the engine, which can have a significant impact on the vehicle's performance. The intake air system is crucial for the proper functioning of the engine as it allows air to mix with fuel for combustion. Any leaks in this system can disrupt the air-fuel ratio, leading to issues such as rough idling, poor acceleration, decreased fuel efficiency, and even engine misfires.

OBDII Code P2279 - Intake Air System Leak
P2279 Code - Intake Air System Leak

Common Causes of P2279

  1. Loose or damaged intake air hoses
  2. Faulty intake manifold gasket
  3. Cracked or damaged intake manifold
  4. Malfunctioning throttle body
  5. Air filter clogged or dirty

Symptoms of P2279

  1. Rough idling or stalling
  2. Reduced acceleration or power
  3. Increased fuel consumption
  4. Engine misfires
  5. Check Engine Light illuminated

How to Fix P2279

  1. Inspect the intake air system for any visible signs of damage or leaks.
  2. Check and tighten all intake air hoses and connections.
  3. Replace any damaged hoses, gaskets, or seals in the intake air system.
  4. Test the intake manifold and throttle body for leaks or malfunctions.
  5. Clear the diagnostic trouble code and reset the Check Engine Light.

Cost to Fix P2279

The cost of repairing an intake air system leak can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, you can expect to pay anywhere from $100 to $500 for parts and labor. It's important to note that diagnosis time and labor rates can vary, so it's best to consult with a professional mechanic for a more accurate estimate based on your individual circumstances.

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Code P2279 Information for Specific Makes

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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