AutoCodes – GMC – P049D 2016 GMC Sierra

P049D 2016 GMC Sierra Code - Exhaust Gas Recirculation Position Not Learned

Quick Answer

The offset of the Exhaust Gas Recirculation (EGR) valve is checked after the offset learning has been completed in the after-run/post drive. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve 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: P049D 2016 GMC Sierra indicates Exhaust Gas Recirculation Position Not Learned.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve 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.

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Code Popularity 165

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 Jun 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P049D 2016 GMC Sierra Description

The offset of the Exhaust Gas Recirculation (EGR) valve is checked after the offset learning has been completed in the after-run/post drive. The difference between the maximum and minimum EGR valve offset values is calculated by the Engine Control Module (ECM). If the difference is above a calibrated threshold or the offset learned value is not within a calibrated range, a fault is recognized. While the offset learning is active, the EGR valve is checked for a jammed valve. If the valve is stuck during opening or closing for a calibrated time, a fault is reported. If either of these conditions occurs, the Diagnostic Trouble Code (DTC) will be set.

OBDII Code P049D 2016 GMC Sierra - Exhaust Gas Recirculation Position Not Learned - AutoCodes.com — P049D 2016 GMC Sierra Code - Exhaust Gas Recirculation Position Not Learned

What does this mean?

What are the Possible Causes of the DTC P049D 2016 GMC Sierra?

Faulty Exhaust Gas Recirculation (EGR) Valve
Exhaust Gas Recirculation Valve harness is open or shorted
Exhaust Gas Recirculation Valve circuit poor electrical connection

How to Fix the DTC P049D 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 P049D 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 P049D 2016 GMC Sierra code?

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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 P049D 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P049D in a 2016 GMC Sierra?

- Common symptoms include rough idle, reduced engine performance, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P049D - Exhaust Gas Recirculation Position Not Learned indicate in a 2016 GMC Sierra?

- This code indicates that the engine control module has detected that the exhaust gas recirculation (EGR) position has not been learned or calibrated properly.

3. What are the possible causes of OBDII code P049D in a 2016 GMC Sierra?

- Possible causes include a faulty EGR valve, carbon buildup in the EGR system, electrical issues in the EGR system, or a malfunctioning EGR position sensor.

4. Can driving with the OBDII code P049D present cause further damage to the vehicle?

- Driving with this code present may cause reduced engine performance and fuel efficiency, but it is unlikely to cause immediate further damage to the vehicle.

5. How can I diagnose and repair OBDII code P049D in my 2016 GMC Sierra?

- Diagnosis involves checking the EGR system for any obstructions or malfunctions, testing the EGR valve and position sensor, and performing a relearn procedure for the EGR position.

6. Is it safe to continue driving my 2016 GMC Sierra with the Check Engine Light illuminated due to code P049D?

- While it is generally safe to drive with this code present, it is recommended to have the issue diagnosed and repaired as soon as possible to prevent potential long-term engine problems.

7. Can I reset the Check Engine Light caused by code P049D in my 2016 GMC Sierra without fixing the underlying issue?

- Resetting the Check Engine Light without addressing the underlying issue will only temporarily clear the light and will not solve the problem causing code P049D.

8. How long does it typically take to repair OBDII code P049D in a 2016 GMC Sierra?

- The repair time for this code can vary depending on the exact cause, but it may take anywhere from 1 to 3 hours for diagnosis and repair.

9. Will fixing OBDII code P049D improve the overall performance and fuel efficiency of my 2016 GMC Sierra?

- Yes, addressing code P049D and ensuring proper EGR system operation can help improve engine performance and fuel efficiency in your GMC Sierra.

10. Are there any preventive maintenance measures I can take to avoid encountering code P049D in my 2016 GMC Sierra in the future?

- Regularly servicing and cleaning the EGR system, using high-quality fuel, and following the manufacturer's maintenance schedule can help prevent issues that may trigger code P049D.