AutoCodes – Generic – P049D

P049D Code - Exhaust Gas Recirculation 'A' Control Position Exceeded Learning Limit

Quick Answer

When the Exhaust Gas Recirculation (EGR) Valve is opening to a position and uses too much current to achieve that position, the diagnostic will fail. 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 indicates Exhaust Gas Recirculation 'A' Control Position Exceeded Learning Limit.
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 14,919

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
Tech Notes ▶
Cost to Diagnose
Comments
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Code P049D Description

When the Exhaust Gas Recirculation (EGR) Valve is opening to a position and uses too much current to achieve that position, the diagnostic will fail. Also at every key on, the EGR valve tries to recalibrate its position. The valve shaft will move until it comes into contact with the valve. If the distance the valve shaft must move is different by a calibrated amount than the originally learned movement the diagnostic fails. The valve will perform this auto zero function at every key on and every time the valve is commanded closed throughout the engine operating cycle. The Powertrain Control Module (PCM) will illuminate the MIL lamp after the diagnostic runs and fails in two consecutive drive cycles. The PCM will also turn on the ETC lamp. During this time the PCM will no longer control the EGR valve. The MIL lamp will turn off once the diagnostic runs and passes in four consecutive drive cycles. The Diagnostic Trouble Code (DTC) will set when the motor effort exceeds a calibrated level or auto zero function fails.

OBDII Code P049D - Exhaust Gas Recirculation 'A' Control Position Exceeded Learning Limit - AutoCodes.com — P049D Code - Exhaust Gas Recirculation 'A' Control Position Exceeded Learning Limit

What does this mean?

What are the Possible Causes of the DTC P049D?

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?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P049D 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.

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Information for Specific Makes

P049D Buick — Exhaust Gas Recirculation Position Not Learned
P049D Cadillac — Exhaust Gas Recirculation Position Not Learned
P049D Chevrolet — Exhaust Gas Recirculation Position Not Learned
P049D Dodge — Exhaust Gas Recirculation Control Position Exceeded Learning Limit
P049D GMC — Exhaust Gas Recirculation Position Not Learned
P049D RAM — Exhaust Gas Recirculation Control Position Exceeded Learning Limit

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.