AutoCodes – GMC – P103F GMC

P103F GMC Code - Reductant Pump Driver High Temperature

Quick Answer

The selective catalytic reduction system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of reductant into the exhaust gas stream entering the selective catalytic reduction catalyst. Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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: P103F GMC indicates Reductant Pump Driver High Temperature.
Common causes: Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor Assembly 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 542

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 Jul 24, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P103F GMC Description

The selective catalytic reduction system reduces Oxides of Nitrogen (NOx) emissions by injecting a metered amount of reductant into the exhaust gas stream entering the selective catalytic reduction catalyst. Within the selective catalytic reduction catalyst, the reductant reacts with the NOx to form nitrogen, carbon dioxide, and water vapor. Upstream and downstream NOx sensors provide the engine control module and the reductant control module via serial data. The Engine Control Module (ECM) controls the reductant injector duty cycle in response to changes in engine-out NOx levels. The reductant control module supplies system voltage to the reductant pump motor. The reductant control module controls the solenoid by grounding the control circuit. The reductant control module can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage. The Diagnostic Trouble Code (DTC) will be set when the reductant control module detects a motor pump driver high temperature.

OBDII Code P103F GMC - Reductant Pump Driver High Temperature - AutoCodes.com — P103F GMC Code - Reductant Pump Driver High Temperature

What does this mean?

What are the Possible Causes of the DTC P103F GMC?

Faulty Reductant Pump and Sensor Assembly
Reductant Pump and Sensor Assembly harness is open or shorted
Reductant Pump and Sensor Assembly circuit poor electrical connection
Faulty Reductant Control Module

How to Fix the DTC P103F 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P103F 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.

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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 P103F GMC Code

1. What are the common symptoms of OBDII code P103F GMC (Reductant Pump Driver High Temperature)?

The common symptoms of this code may include the check engine light coming on, reduced engine performance, and potential issues with the vehicle's exhaust system.

2. What are the possible causes of OBDII code P103F GMC?

Possible causes of this code can include a faulty reductant pump driver module, damaged wiring or connectors in the reductant pump circuit, or issues with the reductant pump itself.

3. How serious is OBDII code P103F GMC?

While the severity of this code can vary, it is important to address it promptly to prevent potential damage to the reductant pump and other emission control components.

4. Can I drive my vehicle with OBDII code P103F GMC?

It is generally not recommended to drive your vehicle with this code present, as it can lead to reduced engine performance and potential damage to emission control components.

5. How can I diagnose OBDII code P103F GMC?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the code and then conducting further testing on the reductant pump circuit and components to identify the root cause of the issue.

6. What are some repair tips for addressing OBDII code P103F GMC?

Repair tips may include checking and repairing any damaged wiring or connectors in the reductant pump circuit, replacing the reductant pump driver module if necessary, and ensuring proper functioning of the reductant pump.

7. Will resetting the check engine light make OBDII code P103F GMC go away?

Simply resetting the check engine light will not fix the underlying issue causing this code. It is important to diagnose and address the root cause of the problem to prevent the code from reoccurring.

8. How much does it cost to repair OBDII code P103F GMC?

The cost of repairing this code can vary depending on the exact cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is recommended to obtain a diagnostic from a qualified mechanic for an accurate cost estimate.

9. Can a DIY enthusiast fix OBDII code P103F GMC?

While some DIY enthusiasts may have the skills to diagnose and repair this code, it is recommended to seek help from a professional mechanic, especially when dealing with emission control components like the reductant pump.

10. How can I prevent OBDII code P103F GMC from coming back?

Regular maintenance of your vehicle's emission control system, including checking for any wiring or connector issues in the reductant pump circuit, can help prevent this code from reoccurring.