Engine-Codes.com
Engine-Codes – GMC – P1479 GMC

P1479 GMC Code - Particulate Matter Sensor Sensitivity Factor Performance

Quick Answer

The P1479 diagnostic trouble code for GMC vehicles indicates an issue with the Particulate Matter Sensor Sensitivity Factor Performance. Common causes include Faulty Sensor: The Particulate Matter Sensor itself may be faulty or damaged, leading to inaccurate readings, Contamination: The sensor may be contaminated with particulate matter buildup, affecting its ability to accurately measure emissions levels, Wiring Issues: Problems with the wiring or electrical connections leading to the sensor can also trigger this code. 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
P1479 GMC indicates Particulate Matter Sensor Sensitivity Factor Performance.
Common causes
Common causes include Faulty Sensor: The Particulate Matter Sensor itself may be faulty or damaged, leading to inaccurate readings, Contamination: The sensor may be contaminated with particulate matter buildup, affecting its ability to accurately measure emissions levels, Wiring Issues: Problems with the wiring or electrical connections leading to the sensor can also trigger this code.
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1479 GMC Description

The P1479 diagnostic trouble code for GMC vehicles indicates an issue with the Particulate Matter Sensor Sensitivity Factor Performance. This sensor is an integral part of the vehicle's emissions control system, specifically designed to monitor the levels of particulate matter (PM) emitted by the engine. Particulate matter consists of tiny particles that are a byproduct of combustion and can be harmful to both human health and the environment.

OBDII Code P1479 GMC - Particulate Matter Sensor Sensitivity Factor Performance
P1479 GMC Code - Particulate Matter Sensor Sensitivity Factor Performance

Common Causes of P1479 GMC

  1. Faulty Sensor: The Particulate Matter Sensor itself may be faulty or damaged, leading to inaccurate readings.
  2. Contamination: The sensor may be contaminated with particulate matter buildup, affecting its ability to accurately measure emissions levels.
  3. Wiring Issues: Problems with the wiring or electrical connections leading to the sensor can also trigger this code.
  4. Engine Issues: Underlying engine problems that result in increased particulate matter emissions can also cause this code to appear.

Symptoms of P1479 GMC

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A malfunctioning Particulate Matter Sensor can lead to decreased fuel efficiency as the engine may not be operating at optimal levels.
  3. Failed Emissions Test: If the sensor is not accurately measuring particulate matter emissions, it can cause the vehicle to fail emissions testing.
  4. Rough Idle: In some cases, a faulty sensor can lead to rough idling or poor engine performance.

How to Fix P1479 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to read the code and determine the specific cause of the problem.
  2. Inspect the Sensor: Check the Particulate Matter Sensor for any signs of damage or contamination. Clean or replace the sensor as needed.
  3. Check Wiring: Inspect the wiring and electrical connections leading to the sensor for any issues. Repair or replace any damaged wiring.
  4. Clear the Code: After making the necessary repairs, clear the diagnostic trouble code using the diagnostic scanner to reset the Check Engine Light.
  5. Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the sensor is now functioning correctly.

Cost to Fix P1479 GMC

The cost of repairing a Particulate Matter Sensor Sensitivity Factor Performance issue can vary depending on the specific cause of the problem and the make and model of the vehicle. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $100 to $200. This puts the total repair cost in the range of $200 to $500. Keep in mind that these are rough estimates, and actual repair costs may vary based on factors such as location, vehicle type, and the extent of the repairs needed. It's advisable to consult with a qualified mechanic or auto repair shop for a more precise cost estimate.

Need more information about the P1479 GMC code?

Need more information on how to fix the P1479 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1479 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 P1479 GMC Code

1. What are the common symptoms of OBDII code P1479 GMC?

Symptoms may include poor engine performance, decreased fuel efficiency, black smoke from the exhaust, and an illuminated check engine light.

2. What are the possible causes of OBDII code P1479 GMC?

Possible causes include a faulty particulate matter sensor, issues with the sensor wiring or connections, software glitches, or problems with the diesel particulate filter.

3. How can I diagnose the cause of OBDII code P1479 GMC?

Diagnosis typically involves using a scan tool to retrieve the code, inspecting the sensor and its wiring for damage, checking the diesel particulate filter for clogs, and performing sensor sensitivity factor tests.

4. What does the Particulate Matter Sensor Sensitivity Factor Performance mean?

This code indicates that the sensitivity factor of the particulate matter sensor is not performing within the expected parameters, which can lead to inaccuracies in detecting particulate matter levels in the exhaust system.

5. Can I continue driving with OBDII code P1479 GMC?

It is not recommended to drive with this code active, as it can lead to increased emissions, reduced engine performance, and potential damage to the diesel particulate filter.

6. How can OBDII code P1479 GMC be repaired?

Repair options may include replacing the particulate matter sensor, repairing or replacing damaged wiring, updating software, cleaning or replacing the diesel particulate filter, and resetting the sensor sensitivity factor.

7. How much does it cost to fix OBDII code P1479 GMC?

Costs can vary depending on the exact cause of the issue, but repairs for this code can range from $200 to $800, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P1479 GMC?

While some simple checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing the root cause of this code may require professional tools and expertise.

9. How long does it take to repair OBDII code P1479 GMC?

The repair time can vary based on the specific issue, but most repairs for this code can be completed within a few hours to a day by a trained mechanic.

10. How can I prevent OBDII code P1479 GMC from recurring?

Regular maintenance, such as ensuring proper diesel particulate filter function, using high-quality fuel, and addressing any sensor issues promptly, can help prevent the recurrence of this code.

Discuss the causes and fixes for P1479 GMC OBDII Code

Submit a New Comment

Code P1479 GMC comments

No comments found for this page.