AutoCodes – Pontiac – P2279 Pontiac

P2279 Pontiac Code - Intake Air Duct Air Leak

Quick Answer

The Engine Control Module (ECM) monitors the volume of air consumed at idle speed. Common causes include Check for intake leaks, Faulty Mass Air Flow (MAF) sensor, Faulty Positive Crankcase Ventilation (PCV) 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: P2279 Pontiac indicates Intake Air Duct Air Leak.
Common causes: Common causes include Check for intake leaks, Faulty Mass Air Flow (MAF) sensor, Faulty Positive Crankcase Ventilation (PCV) 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.

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Code Popularity 520

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Dec 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2279 Pontiac Description

The Engine Control Module (ECM) monitors the volume of air consumed at idle speed. The ECM controls the Idle Air Control (IAC) motor in order to regulate the air flow through the throttle body. The amount of air flowing through the throttle body will normally determine the engine speed. If there is an Intake Air (IA) leak or a malfunction in the Positive Crankcase Ventilation (PCV) system excess air can enter the intake manifold affecting engine speed. The ECM uses sensor input in order to determine an estimated volume of air that is used during normal idle conditions. If there is any excess air, the estimated volume of air will be more than the expected value and Diagnostic Trouble Code (DTC) P2279 sets.

OBDII Code P2279 Pontiac - Intake Air Duct Air Leak - AutoCodes.com — P2279 Pontiac Code - Intake Air Duct Air Leak

What does this mean?

What are the Possible Causes of the DTC P2279 Pontiac?

Check for intake leaks
Faulty Mass Air Flow (MAF) sensor
Faulty Positive Crankcase Ventilation (PCV) system

How to Fix the DTC P2279 Pontiac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2279 Pontiac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.

Frequently Asked Questions about P2279 Pontiac Code

1. What does the OBDII code P2279 mean for a Pontiac?

P2279 indicates an air intake system leak, meaning unmetered air is entering the engine, disrupting the air-fuel mixture.

2. What are common symptoms of code P2279 in a Pontiac?

Symptoms include rough idling, poor acceleration, reduced fuel efficiency, stalling, and the Check Engine Light turning on.

3. What causes the P2279 code in a Pontiac?

Common causes include a cracked intake air duct, loose or damaged vacuum hoses, a faulty intake manifold gasket, or a malfunctioning PCV valve.

4. Can I drive my Pontiac with the P2279 code?

While the car may still run, driving with this code can lead to engine performance issues and potential long-term damage if not addressed.

5. How do I diagnose the P2279 code on my Pontiac?

Inspect the intake air duct, vacuum hoses, and intake manifold for leaks, and check PCV valve operation. A smoke test can help locate hard-to-find leaks.

6. How do I fix the P2279 code on a Pontiac?

Repairs may include replacing a damaged intake air duct, fixing or replacing vacuum hoses, resealing the intake manifold, or replacing the PCV valve.

7. Can a dirty air filter cause the P2279 code?

A dirty air filter itself wonâ€™t cause this code, but replacing it during diagnostics can help rule out airflow restrictions.

8. How much does it cost to repair the P2279 code on a Pontiac?

The cost depends on the issue, ranging from $20 for a new vacuum hose to $200+ for intake manifold repairs, excluding labor.

9. Will clearing the P2279 code fix the problem?

Clearing the code resets the Check Engine Light temporarily, but the underlying issue causing the air leak must be repaired for a permanent fix.

10. Can a P2279 code cause engine damage in my Pontiac?

If left unresolved, the unmetered air can cause the engine to run lean, potentially leading to overheating, misfires, or severe engine damage over time.