P049D GMC 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 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 GMC indicates Exhaust Gas Recirculation Position Not Learned.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation 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.
Code P049D GMC Description
What are the Possible Causes of the DTC P049D GMC?
- Faulty Exhaust Gas Recirculation Valve
- Exhaust Gas Recirculation Valve harness is open or shorted
- Exhaust Gas Recirculation Valve circuit poor electrical connection
How to Fix the DTC P049D GMC?
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 GMC 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 GMC code?
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Information for Specific GMC Models
- P049D 2014 GMC Sierra — Exhaust Gas Recirculation Position Not Learned
- P049D 2015 GMC Sierra — Exhaust Gas Recirculation Position Not Learned
- P049D 2016 GMC Sierra — Exhaust Gas Recirculation Position Not Learned
- P049D 2017 GMC Sierra — Exhaust Gas Recirculation Position Not Learned
- P049D 2018 GMC Sierra — Exhaust Gas Recirculation Position Not Learned
Frequently Asked Questions about P049D GMC Code
What does the OBDII code P049D mean on a GMC vehicle?
The P049D code indicates that the Exhaust Gas Recirculation (EGR) position has not been learned, typically due to a failure in the EGR system or its calibration process.
What are the common symptoms of the P049D code?
Symptoms may include a check engine light, reduced engine performance, poor fuel efficiency, and potential hesitation or rough idling.
What causes the P049D code to appear?
Common causes include a faulty EGR valve, carbon buildup in the EGR passages, wiring or connector issues, or a failed EGR position sensor.
Can I drive my GMC with the P049D code active?
While the vehicle may still be drivable, it’s not recommended as prolonged driving could lead to reduced engine performance and potential damage to emissions components.
How do I fix the P049D code on my GMC?
Repairs may involve cleaning or replacing the EGR valve, inspecting and repairing wiring or connectors, or recalibrating the EGR system using a scan tool.
How does carbon buildup trigger the P049D code?
Carbon deposits can block the EGR passages or impair the movement of the EGR valve, preventing the system from learning its proper position.
What tools are required to diagnose the P049D code?
A scan tool with bi-directional capabilities is often needed to check EGR system operation and perform recalibration or position learning.
Is the P049D code related to emissions?
Yes, the EGR system helps reduce nitrogen oxide (NOx) emissions, and issues with the system can affect your vehicle’s emissions compliance.
How much does it typically cost to repair the P049D code?
Repair costs can vary widely, ranging from $100 to $500 depending on whether the EGR valve needs cleaning, repair, or replacement.
Can a software update fix the P049D code?
In some cases, a software update from the manufacturer may resolve calibration issues causing the code.
Discuss the causes and fixes for P049D GMC OBDII Code
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