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Engine-Codes – GMC – P2047 GMC

P2047 GMC Code - Reductant Injector Control Circuit

Quick Answer

The P2047 diagnostic trouble code (DTC) for GMC vehicles refers to a malfunction in the reductant injector control circuit. Common causes include Faulty Reductant Injector: The reductant injector itself may be faulty, leading to issues with the control circuit, Wiring Issues: Damage or corrosion to the wiring connecting the reductant injector to the PCM can cause a malfunction in the control circuit, PCM Malfunction: A problem with the powertrain control module (PCM) can also trigger the P2047 code. 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: The reductant injector itself may be faulty, leading to issues with the control circuit, Wiring Issues: Damage or corrosion to the wiring connecting the reductant injector to the PCM can cause a malfunction in the control circuit, PCM Malfunction: A problem with the powertrain control module (PCM) can also trigger the P2047 code.
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 09, 2024
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Code P2047 GMC Description

The P2047 diagnostic trouble code (DTC) for GMC vehicles refers to a malfunction in the reductant injector control circuit. This code specifically relates to the reductant injector, which is a component of the selective catalytic reduction (SCR) system. The SCR system is responsible for reducing harmful emissions from the vehicle's exhaust by injecting a reductant (often a urea-based solution) into the exhaust stream. The reductant injector control circuit is essential for regulating the proper amount of reductant injected into the exhaust system to effectively reduce emissions.

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

Common Causes of P2047 GMC

  1. Faulty Reductant Injector: The reductant injector itself may be faulty, leading to issues with the control circuit.
  2. Wiring Issues: Damage or corrosion to the wiring connecting the reductant injector to the PCM can cause a malfunction in the control circuit.
  3. PCM Malfunction: A problem with the powertrain control module (PCM) can also trigger the P2047 code.
  4. Sensor Malfunction: Malfunctioning sensors that monitor the reductant injector's operation can cause the control circuit to malfunction.

Symptoms of P2047 GMC

  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 Fuel Efficiency: A malfunctioning reductant injector control circuit can lead to decreased fuel efficiency as the engine may not be operating at optimal levels.
  3. Poor Performance: The vehicle may experience reduced performance, including sluggish acceleration and rough idling.
  4. Increased Emissions: The vehicle may emit higher levels of pollutants due to the improper functioning of the SCR system.

How to Fix P2047 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the P2047 code and conduct a thorough inspection of the reductant injector, wiring, and PCM to identify the root cause of the problem.
  2. Replace Reductant Injector: If the reductant injector is found to be faulty, it will need to be replaced with a new unit.
  3. Repair Wiring: Address any damaged or corroded wiring connecting the reductant injector to the PCM to ensure proper electrical connections.
  4. Reset PCM: Clear the fault code from the PCM and reset the system to see if the issue persists after the repair.

Cost to Fix P2047 GMC

The cost of repairing a P2047 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, replacing the reductant injector can cost anywhere from $200 to $500, while addressing wiring issues or PCM malfunctions may incur additional costs. Labor rates typically range from $80 to $150 per hour, so the total repair cost can be influenced by the amount of time required to diagnose and fix the problem. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P2047 GMC









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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 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.

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