AutoCodes – Buick – P2047 Buick

P2047 Buick 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 Buick 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 699

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 Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2047 Buick 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 Buick - Reductant Injector Control Circuit - AutoCodes.com — P2047 Buick Code - Reductant Injector Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2047 Buick?

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 Buick?

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 P2047 Buick 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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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 Buick Code

1. What does the OBDII code P2047 mean for a Buick?

P2047 indicates an issue with the reductant injector control circuit, which manages the delivery of diesel exhaust fluid (DEF) in vehicles equipped with selective catalytic reduction (SCR) systems.

2. What are the common symptoms of code P2047 in a Buick?

Symptoms may include the check engine light turning on, reduced fuel efficiency, increased emissions, or the vehicle entering limp mode.

3. What causes the P2047 code to be triggered?

Common causes include a faulty reductant injector, wiring or connector issues in the injector circuit, or a malfunctioning control module.

4. Can I drive my Buick with the P2047 code active?

Driving with this code is not recommended, as it can lead to increased emissions and may cause further damage to the SCR system or other components.

5. How do I diagnose the P2047 code on my Buick?

Diagnosis involves inspecting the reductant injector, checking the wiring and connectors for damage, and testing the control circuit for proper voltage and continuity.

6. What tools are needed to troubleshoot the P2047 code?

Youâ€™ll need an OBDII scanner, a multimeter to test electrical connections, and possibly a repair manual for your specific Buick model.

7. How do I fix the P2047 code on my Buick?

Repairs may involve replacing the reductant injector, repairing damaged wiring or connectors, or reprogramming or replacing the control module, depending on the root cause.

8. How much does it cost to repair a P2047 code on a Buick?

Repair costs vary but can range from $100 to $500, depending on whether the issue involves a simple wiring fix or injector replacement.

9. Can a software update fix the P2047 code?

In some cases, a software update for the engine control module (ECM) may resolve the issue if itâ€™s related to incorrect programming.

10. How can I prevent the P2047 code from reoccurring?

Regular maintenance of the SCR system, ensuring proper DEF quality, and promptly addressing wiring or connector issues can help prevent this code from reappearing.