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P2047 2014 GMC Sierra Code - Reductant Injector Control Circuit

Quick Answer

The P2047 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Reductant Injector Control Circuit. Common causes include Faulty Reductant Injector: A malfunctioning reductant injector can trigger the P2047 code, Wiring Harness Issues: Damage or corrosion in the wiring harness connecting the reductant injector to the control module can disrupt the circuit, Connector Problems: Loose or corroded electrical connectors can lead to poor contact and circuit malfunction. 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 2014 GMC Sierra indicates Reductant Injector Control Circuit.
Common causes
Common causes include Faulty Reductant Injector: A malfunctioning reductant injector can trigger the P2047 code, Wiring Harness Issues: Damage or corrosion in the wiring harness connecting the reductant injector to the control module can disrupt the circuit, Connector Problems: Loose or corroded electrical connectors can lead to poor contact and circuit malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P2047 2014 GMC Sierra Description

The P2047 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Reductant Injector Control Circuit. In vehicles equipped with selective catalytic reduction (SCR) systems, the reductant injector is responsible for injecting a urea-based solution (commonly known as diesel exhaust fluid or DEF) into the exhaust stream to reduce harmful emissions. The control circuit ensures that the injector operates correctly, delivering the right amount of DEF at the right time to optimize the SCR system's efficiency.

OBDII Code P2047 2014 GMC Sierra - Reductant Injector Control Circuit
P2047 2014 GMC Sierra Code - Reductant Injector Control Circuit

Common Causes of P2047 2014 GMC Sierra

  1. Faulty Reductant Injector: A malfunctioning reductant injector can trigger the P2047 code.
  2. Wiring Harness Issues: Damage or corrosion in the wiring harness connecting the reductant injector to the control module can disrupt the circuit.
  3. Connector Problems: Loose or corroded electrical connectors can lead to poor contact and circuit malfunction.
  4. Water Intrusion: Moisture entering the control circuit can cause short circuits and trigger the P2047 code.
  5. Control Module Failure: A malfunction in the control module responsible for managing the reductant injector operation can also be a potential cause.

Symptoms of P2047 2014 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P2047 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Performance: Drivers may experience a decrease in engine power or responsiveness due to the SCR system's compromised efficiency.
  3. Poor Fuel Economy: A malfunctioning reductant injector control circuit can lead to increased fuel consumption as the engine compensates for emission control issues.
  4. Failed Emissions Test: If the SCR system is not functioning correctly, the vehicle may fail emissions tests due to elevated emissions levels.

How to Fix P2047 2014 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the reductant injector control circuit.
  2. Check Wiring and Connectors: Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test Reductant Injector: Verify the functionality of the reductant injector to ensure it is operating correctly.
  4. Replace Faulty Components: If the reductant injector, wiring harness, or control module is found to be faulty, replace the defective components.
  5. Clear Codes and Test Drive: After completing the repairs, clear the DTCs from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2047 2014 GMC Sierra

The cost of repairing a P2047 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the parts required for this repair, such as a reductant injector, wiring harness, or control module, can range from $200 to $600. Labor costs at auto repair shops usually fall between $80 and $150 per hour, with the total repair bill potentially amounting to $300 to $800 or more. It's advisable to contact local auto repair shops for accurate estimates based on your vehicle's make and model, as well as the severity of the issue.

What does this mean?

Tech Notes for P2047 2014 GMC Sierra









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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 2014 GMC Sierra Code

1. What does the OBDII code P2047 mean on a 2014 GMC Sierra?

P2047 indicates a problem with the Reductant Injector Control Circuit, which is responsible for managing the diesel exhaust fluid (DEF) injection system.

2. What are the common symptoms of code P2047 on a 2014 GMC Sierra?

Symptoms may include an illuminated Check Engine Light, reduced engine performance, poor fuel efficiency, or improper DEF injection.

3. What causes the P2047 code to appear on a 2014 GMC Sierra?

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

4. Can I drive my 2014 GMC Sierra with the P2047 code?

While the truck may still be drivable, continuing to operate it with this code can lead to increased emissions, reduced performance, and possible damage to the emissions system.

5. How can I diagnose the P2047 code on my 2014 GMC Sierra?

Start by inspecting the wiring and connectors for damage or corrosion, check the reductant injector for proper operation, and use a scan tool to verify voltage and resistance in the circuit.

6. How do I fix the P2047 code on a 2014 GMC Sierra?

Possible fixes include repairing damaged wiring or connectors, replacing the reductant injector, or reprogramming or replacing the control module if necessary.

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

You’ll need an OBDII scan tool, a multimeter, and potentially a wiring diagram for the reductant injector circuit.

8. How much does it cost to repair the P2047 code on a 2014 GMC Sierra?

Repair costs vary but can range from $100 to $500, depending on whether wiring repairs, a new reductant injector, or module replacement is required.

9. Can a clogged reductant injector cause the P2047 code?

Yes, a clogged or malfunctioning reductant injector can prevent proper DEF delivery, triggering this code.

10. Does a software update fix the P2047 code on a 2014 GMC Sierra?

In some cases, a software update for the engine control module (ECM) may resolve issues related to the reductant injector circuit. Consult your dealer for updates.

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