P1479 2016 GMC Sierra Code - Particulate Matter Sensor Sensitivity Factor Performance
Quick Answer
The Particulate Matter (PM) sensor monitors the amount of the particulates (soot) in the diesel exhaust gas exiting the tailpipe. Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor circuit poor electrical connection. 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 2016 GMC Sierra indicates Particulate Matter Sensor Sensitivity Factor Performance.
- Common causes
- Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor circuit poor electrical connection.
- 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.
Code P1479 2016 GMC Sierra Description
The operation of the PM Sensor is based on the electrical conductivity characteristic of the diesel particulate. As the exhaust gas flows over the sensing element, soot is absorbed in the combs between the electrodes, eventually creating a conductive path. When the path is formed, it generates a current based on the voltage being applied to the element. The measurement process continues until a preset current value is reached. To avoid misleading readings, the sensor performs a regeneration where the soot is cleaned off by heating up the element before the measurement phase begins. The amount of regenerations is based on vehicle strategy; when the calibrated number of regenerations is reached, the cumulative current readings are used to determine the amount of soot concentration in the exhaust gas which in turn determines the collection efficiency of the Diesel Particulate Filter (DPF).
The Diagnostic Trouble Code (DTC) will be set when the particular matter sensor control unit detects a fault in the particulate matter sensor circuitry.
What are the Possible Causes of the DTC P1479 2016 GMC Sierra?
- Faulty Exhaust Particulate Matter Sensor
- Exhaust Particulate Matter Sensor harness is open or shorted
- Exhaust Particulate Matter Sensor circuit poor electrical connection
How to Fix the DTC P1479 2016 GMC Sierra?
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 P1479 2016 GMC Sierra 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.
Need more information about the P1479 2016 GMC Sierra code?
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Frequently Asked Questions about P1479 2016 GMC Sierra Code
What does the OBDII code P1479 mean on a 2016 GMC Sierra?
P1479 indicates an issue with the Particulate Matter Sensor Sensitivity Factor Performance, meaning the sensor is not detecting or reporting particulate matter levels as expected.
What are the common symptoms of code P1479?
Common symptoms include reduced fuel efficiency, illuminated Check Engine Light, potential loss of power, and increased exhaust emissions.
What causes the P1479 code to appear?
Possible causes include a faulty particulate matter sensor, wiring or connector issues, excessive soot buildup, or a problem with the exhaust system.
Can driving with code P1479 damage my vehicle?
Driving with this code may not immediately damage your vehicle, but it can lead to increased emissions, reduced efficiency, and possible damage to the exhaust system or DPF if left unresolved.
How is the P1479 code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the particulate matter sensor and its wiring, and test the exhaust system for clogs or leaks.
Can a dirty particulate matter sensor cause code P1479?
Yes, excessive soot or debris on the sensor can impair its function and trigger this code.
How can I fix the P1479 code on a 2016 GMC Sierra?
Repairs may include cleaning or replacing the particulate matter sensor, repairing damaged wiring or connectors, or addressing exhaust system issues.
How much does it cost to fix code P1479?
The repair cost can range from $100 to $400, depending on whether the sensor needs cleaning, repair, or replacement.
Can a software update resolve the P1479 code?
In some cases, a software update for the engine control module (ECM) may resolve the issue if it’s related to incorrect sensitivity calibration.
Is code P1479 covered under warranty for a 2016 GMC Sierra?
This depends on the vehicle's warranty terms and mileage. Check with your local dealership to see if emissions-related components are still covered.
Discuss the causes and fixes for P1479 2016 GMC Sierra OBDII Code
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