AutoCodes – Chevrolet – P049D 2016 Chevrolet Silverado

P049D 2016 Chevrolet Silverado 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 Chevrolet Silverado 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 422

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 Jun 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P049D 2016 Chevrolet Silverado 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 Chevrolet Silverado - Exhaust Gas Recirculation Position Not Learned - AutoCodes.com — P049D 2016 Chevrolet Silverado Code - Exhaust Gas Recirculation Position Not Learned

What does this mean?

What are the Possible Causes of the DTC P049D 2016 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 Chevrolet Silverado code?

Need more information on how to fix the P049D 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 Chevrolet Silverado Code

1. What does the OBDII code P049D mean for a 2016 Chevrolet Silverado?

P049D indicates that the Exhaust Gas Recirculation (EGR) system's position has not been learned, meaning the system cannot properly determine the EGR valve's position.

2. What are common symptoms of code P049D on a 2016 Chevrolet Silverado?

Symptoms may include a check engine light, reduced engine performance, rough idling, or increased emissions.

3. What causes the P049D code to appear on a 2016 Chevrolet Silverado?

Common causes include a malfunctioning EGR valve, carbon buildup in the EGR system, wiring issues, or a problem with the EGR position sensor.

4. Can a dirty EGR valve cause the P049D code?

Yes, carbon buildup in the EGR valve can prevent it from functioning correctly, leading to the P049D code.

5. How do you diagnose the P049D code on a 2016 Chevrolet Silverado?

Diagnosis typically involves scanning for codes, inspecting the EGR valve for carbon buildup or damage, checking the wiring and connectors, and testing the EGR position sensor.

6. Can I drive my 2016 Chevrolet Silverado with the P049D code?

While it may still be drivable, driving with this code can lead to reduced performance, increased emissions, and potential long-term engine damage.

7. How do you fix the P049D code on a 2016 Chevrolet Silverado?

Repairs may include cleaning or replacing the EGR valve, repairing wiring or connectors, or replacing the EGR position sensor if defective.

8. How much does it cost to repair the P049D code on a 2016 Chevrolet Silverado?

The cost varies but typically ranges from $150 to $600, depending on whether the EGR valve needs cleaning or replacement.

9. Does the P049D code affect emissions testing?

Yes, the P049D code can cause your vehicle to fail an emissions test due to improper EGR system functioning.

10. Can a software update fix the P049D code on a 2016 Chevrolet Silverado?

In some cases, a software update from the manufacturer may help resolve issues with the EGR system if the problem is related to the engine control module (ECM).