AutoCodes – Chevrolet – P049D 2017 Chevrolet Silverado

P049D 2017 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 2017 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 494

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
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Code P049D 2017 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 2017 Chevrolet Silverado - Exhaust Gas Recirculation Position Not Learned - AutoCodes.com — P049D 2017 Chevrolet Silverado Code - Exhaust Gas Recirculation Position Not Learned

What does this mean?

What are the Possible Causes of the DTC P049D 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P049D 2017 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 2017 Chevrolet Silverado Code

What does the OBDII code P049D mean on a 2017 Chevrolet Silverado?

The code P049D indicates that the Exhaust Gas Recirculation (EGR) Position has not been properly learned by the engine control module (ECM).

What are common symptoms of the P049D code?

Common symptoms include an illuminated check engine light, decreased fuel efficiency, rough idling, or reduced engine performance.

What causes the P049D code on a 2017 Chevrolet Silverado?

Causes can include a malfunctioning EGR valve, carbon buildup in the EGR system, a defective EGR position sensor, or a software issue in the ECM.

How can I fix the P049D code on my Silverado?

Possible fixes include cleaning or replacing the EGR valve, inspecting and clearing carbon buildup, verifying EGR valve wiring, and performing an EGR position relearn with a scan tool.

Can I drive with the P049D code active?

While the vehicle may still be drivable, ignoring this code can lead to reduced performance, increased emissions, and potential damage to other components over time.

How do I perform an EGR position relearn?

You will need a compatible scan tool to initiate the EGR position relearn procedure. Follow the manufacturerâ€™s instructions for your specific tool and vehicle.

What tools are required to diagnose the P049D code?

Basic tools include a scan tool capable of reading and clearing OBDII codes, a multimeter for electrical checks, and possibly a borescope for inspecting carbon deposits.

How much does it cost to repair the P049D code?

Repair costs can vary depending on the issue, ranging from $150 for a cleaning to $500 or more for replacing the EGR valve or position sensor.

Can a software update fix the P049D code?

Yes, in some cases, a software issue in the ECM may cause the code, and updating the ECM software at the dealership can resolve the problem.

Why does carbon buildup cause the P049D code?

Carbon buildup can restrict or block the EGR valve, preventing it from reaching the correct position and causing the ECM to fail the position learning process.