AutoCodes – GMC – P12A6 2015 GMC Sierra

P12A6 2015 GMC Sierra Code - Fuel Pump Driver Control Module Enable Circuit Performance

Quick Answer

The Engine Control Module (ECM) provides ignition voltage to the Fuel Pump Driver Control Module whenever the engine is cranking or running. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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: P12A6 2015 GMC Sierra indicates Fuel Pump Driver Control Module Enable Circuit Performance.
Common causes: Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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 630

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 Aug 13, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P12A6 2015 GMC Sierra Description

The Engine Control Module (ECM) provides ignition voltage to the Fuel Pump Driver Control Module whenever the engine is cranking or running. The ECM enables the Fuel Pump Driver Control Module as long as the engine is cranking or running, and ignition system reference pulses are received. While this enables voltage is being received, the Fuel Pump Driver Control Module supplies a varying voltage to the fuel tank fuel pump module in order to maintain the desired fuel line pressure. The Diagnostic Trouble Code (DTC) will be set if the ECM state of the fuel pump enable circuit does not match the state of the fuel pump enable circuit sensed by the fuel pump driver control module for greater than 0.5 s.

OBDII Code P12A6 2015 GMC Sierra - Fuel Pump Driver Control Module Enable Circuit Performance - AutoCodes.com — P12A6 2015 GMC Sierra Code - Fuel Pump Driver Control Module Enable Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P12A6 2015 GMC Sierra?

Faulty Fuel Pump Driver Control Module
Fuel Pump Driver Control Module harness is open or shorted
Fuel Pump Driver Control Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P12A6 2015 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P12A6 2015 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 P12A6 2015 GMC Sierra code?

Need more information on how to fix the P12A6 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P12A6 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P12A6 2015 GMC Sierra Code

1. What does the OBDII code P12A6 mean for a 2015 GMC Sierra?

P12A6 indicates an issue with the Fuel Pump Driver Control Module Enable Circuit Performance, meaning the module is not functioning as expected to control fuel pump operation.

2. What are the common symptoms of P12A6 on a 2015 GMC Sierra?

Symptoms may include difficulty starting the engine, reduced engine performance, stalling, and an illuminated check engine light.

3. What causes the P12A6 code on a GMC Sierra?

Common causes include a faulty fuel pump driver control module, damaged wiring or connectors, a blown fuse, or a malfunctioning ECM (Engine Control Module).

4. Can a faulty fuel pump trigger the P12A6 code?

While a faulty fuel pump is not the direct cause, issues with the control module that manages the pump can lead to this code.

5. How do I diagnose the P12A6 code on my 2015 GMC Sierra?

Start by inspecting the wiring and connectors to the fuel pump driver control module, checking for damage or corrosion. Use a scan tool to monitor module signals and test the circuit.

6. Is it safe to drive with the P12A6 code present?

Driving with this code is not recommended, as it can lead to poor engine performance, stalling, or even a complete inability to start the vehicle.

7. How do I fix the P12A6 code on a 2015 GMC Sierra?

Repairs may involve replacing the fuel pump driver control module, repairing damaged wiring, or addressing issues with the ECM.

8. How much does it cost to fix the P12A6 code?

Repair costs can vary but typically range from $150 to $600, depending on whether the module, wiring, or ECM needs replacement or repair.

9. Can I reset the P12A6 code without fixing the issue?

Clearing the code without addressing the root cause will likely result in the code returning, as the underlying issue remains unresolved.

10. Do I need a professional mechanic to fix the P12A6 code?

If you are comfortable with electrical diagnostics and repairs, you may attempt it yourself. However, for complex issues or module replacement, consulting a professional is recommended.