AutoCodes – GMC – P2047 GMC

P2047 GMC Code - Reductant Injector Control Circuit

Quick Answer

The Reductant Injector is a component of selective catalytic reduction system used to dose the reductant fluid to the exhaust gas and participate in the reduction reactions. Common causes include Faulty Reductant Injector, Reductant Injector harness is open or shorted, Reductant Injector 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: P2047 GMC indicates Reductant Injector Control Circuit.
Common causes: Common causes include Faulty Reductant Injector, Reductant Injector harness is open or shorted, Reductant Injector 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 2,850

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 Oct 01, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P2047 GMC Description

The Reductant Injector is a component of selective catalytic reduction system used to dose the reductant fluid to the exhaust gas and participate in the reduction reactions. The Engine Control Module (ECM) calculates the injection time of the reductant injector based on the measurement of the NOx sensors. To activate the injector the ECM supplies a PWM signal to the high control circuit and the low control circuit is always commanded ON. The Diagnostic Trouble Code (DTC) will be set when the Reductant Control Module detects an open in the control circuit.

OBDII Code P2047 GMC - Reductant Injector Control Circuit - AutoCodes.com — P2047 GMC Code - Reductant Injector Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2047 GMC?

Faulty Reductant Injector
Reductant Injector harness is open or shorted
Reductant Injector circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2047 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2047 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 P2047 GMC code?

Need more information on how to fix the P2047 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P2047 2014 GMC Sierra — Reductant Injector Control Circuit
P2047 2015 GMC Sierra — Reductant Injector Control Circuit
P2047 2016 GMC Sierra — Reductant Injector Control Circuit
P2047 2017 GMC Sierra — Reductant Injector Control Circuit
P2047 2018 GMC Sierra — Reductant Injector Control Circuit

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 P2047 GMC Code

1. What are the common symptoms of OBDII code P2047 on a GMC vehicle?

The common symptoms of P2047 include the Check Engine Light coming on, reduced engine performance, and potential difficulty starting the vehicle.

2. What does the OBDII code P2047 GMC indicate?

OBDII code P2047 indicates a problem with the reductant injector control circuit in the vehicle's emissions control system.

3. What are the possible causes of OBDII code P2047 on a GMC vehicle?

Possible causes of P2047 include a faulty reductant injector, wiring issues in the control circuit, a defective reductant injector module, or a malfunctioning powertrain control module (PCM).

4. How can I diagnose the cause of OBDII code P2047 on my GMC vehicle?

Diagnosing P2047 typically involves using a scan tool to read the code, checking the wiring and connectors related to the reductant injector, testing the injector's resistance, and inspecting the reductant injector module.

5. Can I continue driving my GMC vehicle with OBDII code P2047?

It is not recommended to continue driving with P2047 present, as it can lead to increased emissions, reduced fuel efficiency, and potential damage to the vehicle's engine over time.

6. How can I repair OBDII code P2047 on my GMC vehicle?

Repairing P2047 may involve replacing the faulty reductant injector, repairing any damaged wiring or connectors, replacing the reductant injector module, or reprogramming the PCM.

7. Will resetting the Check Engine Light resolve OBDII code P2047 on my GMC vehicle?

Resetting the Check Engine Light may temporarily clear the code, but it will not fix the underlying issue causing P2047. It's important to diagnose and repair the problem to prevent it from recurring.

8. Can a DIY enthusiast fix OBDII code P2047 on a GMC vehicle?

DIY enthusiasts with knowledge of automotive systems and access to appropriate tools may be able to diagnose and repair P2047. However, if unsure, it is recommended to seek professional help.

9. How much does it typically cost to repair OBDII code P2047 on a GMC vehicle?

The cost of repairing P2047 can vary depending on the specific cause of the issue, the parts needed, and labor costs. It's advisable to obtain quotes from reputable auto repair shops.

10. Is OBDII code P2047 a common issue in GMC vehicles?

While P2047 may occur in GMC vehicles, its frequency can vary. Regular maintenance and prompt attention to any Check Engine Light warnings can help prevent this issue from occurring.