AutoCodes – GMC – P2048 2014 GMC Sierra

P2048 2014 GMC Sierra Code - Reductant Injector Control Circuit Low Voltage

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: P2048 2014 GMC Sierra indicates Reductant Injector Control Circuit Low Voltage.
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 231

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 P2048 2014 GMC Sierra 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 a short to ground in the low control circuit.

OBDII Code P2048 2014 GMC Sierra - Reductant Injector Control Circuit Low Voltage - AutoCodes.com — P2048 2014 GMC Sierra Code - Reductant Injector Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2048 2014 GMC Sierra?

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 P2048 2014 GMC Sierra?

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 P2048 2014 GMC Sierra 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 P2048 2014 GMC Sierra code?

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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 P2048 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P2048 in a 2014 GMC Sierra?

- Common symptoms include the Check Engine Light coming on, reduced engine performance, and possible rough idling.

2. What does the OBDII code P2048 "Reductant Injector Control Circuit Low Voltage" mean for a 2014 GMC Sierra?

- This code indicates that there is low voltage detected in the control circuit of the reductant injector in the vehicle's emission system.

3. What are some possible causes of OBDII code P2048 in a 2014 GMC Sierra?

- Possible causes include a faulty reductant injector, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).

4. How can I diagnose the issue related to OBDII code P2048 in my 2014 GMC Sierra?

- Diagnosing the issue involves checking the wiring and connectors for damage, testing the reductant injector for proper operation, and scanning the PCM for any related trouble codes.

5. Can I continue driving my 2014 GMC Sierra with OBDII code P2048 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to reduced engine performance and potential damage to the emission system.

6. How can I repair OBDII code P2048 in my 2014 GMC Sierra?

- Repair options may include replacing the faulty reductant injector, repairing any damaged wiring or connectors, or reprogramming the PCM if necessary.

7. Is it possible to reset the Check Engine Light after fixing OBDII code P2048 in a 2014 GMC Sierra?

- Yes, after the issue has been repaired, the Check Engine Light can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

8. Are there any DIY tips for troubleshooting OBDII code P2048 in a 2014 GMC Sierra?

- DIY tips include visually inspecting wiring and connectors, checking for loose connections, and ensuring proper installation of the reductant injector.

9. How critical is it to address OBDII code P2048 promptly in a 2014 GMC Sierra?

- It is important to address this code promptly to prevent potential damage to the emission system and ensure optimal engine performance.

10. Can a professional mechanic help with diagnosing and repairing OBDII code P2048 in a 2014 GMC Sierra?

- Yes, a professional mechanic has the expertise and tools to accurately diagnose and repair the issue related to OBDII code P2048 in your GMC Sierra.