AutoCodes – Cadillac – P2279 Cadillac

P2279 Cadillac 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 Cadillac 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 624

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 Cadillac 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 Cadillac - Intake Air Duct Air Leak - AutoCodes.com — P2279 Cadillac Code - Intake Air Duct Air Leak

What does this mean?

What are the Possible Causes of the DTC P2279 Cadillac?

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

How to Fix the DTC P2279 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code P2279 in a Cadillac related to an intake air duct air leak?

The common symptoms include a rough idle, reduced engine performance, and the illumination of the check engine light.

2. What can cause the intake air duct air leak triggering OBDII code P2279 in a Cadillac?

Common causes include a cracked or loose intake air duct, a faulty intake manifold gasket, or a damaged air filter housing.

3. How can I diagnose the intake air duct air leak causing OBDII code P2279 in my Cadillac?

You can visually inspect the intake air duct for cracks or looseness, perform a smoke test to detect leaks, or use a scan tool to monitor the engine's air/fuel ratio.

4. What are the potential risks of driving with OBDII code P2279 due to an intake air duct air leak in a Cadillac?

Continued driving with this issue can lead to poor fuel efficiency, engine misfires, and potential damage to other engine components over time.

5. Can I repair the intake air duct air leak causing OBDII code P2279 in my Cadillac myself?

If you have the necessary automotive knowledge and tools, you may be able to repair the issue yourself by replacing the damaged intake air duct, intake manifold gasket, or air filter housing.

6. How much does it typically cost to repair the intake air duct air leak triggering OBDII code P2279 in a Cadillac at a professional mechanic's shop?

The cost of repair can vary depending on the extent of the damage and the labor rates in your area, but it could range from $100 to $500 or more.

7. Will resetting the check engine light temporarily fix OBDII code P2279 related to an intake air duct air leak in a Cadillac?

Resetting the check engine light without addressing the underlying issue will only temporarily turn off the light, and the code is likely to reappear once the problem persists.

8. Is it safe to continue driving my Cadillac with OBDII code P2279 caused by an intake air duct air leak?

It is not recommended to drive your Cadillac with this issue for an extended period as it can lead to further engine problems and decreased performance.

9. Can a dirty air filter cause OBDII code P2279 related to an intake air duct air leak in a Cadillac?

While a dirty air filter can affect engine performance, it is not a common cause of OBDII code P2279. However, it's important to regularly replace the air filter as part of routine maintenance.

10. How long does it typically take to repair the intake air duct air leak causing OBDII code P2279 in a Cadillac?

The repair time can vary based on the specific cause of the issue and the mechanic's workload, but it generally takes between 1 to 3 hours to diagnose and fix the intake air duct air leak.