AutoCodes – GMC – P251F 2014 GMC Sierra

P251F 2014 GMC Sierra Code - Power Take-Off Engine Shutdown Control Circuit High Voltage

Quick Answer

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off 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: P251F 2014 GMC Sierra indicates Power Take-Off Engine Shutdown Control Circuit High Voltage.
Common causes: Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off 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 181

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 Sep 21, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P251F 2014 GMC Sierra Description

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. The PTO system specifically controls engine speed to values higher than normal base idle, PTO load relay engagement, and remote starting and shutdown of the engine. When the operator requests PTO using either the PTO switch or PTO remote, the engine RPM will increase to a default standby speed. The Engine Control Module (ECM) converts the data from the engine speed sensor to a 2 pulses/engine revolution signal. When PTO is engaged, the power take-off control module sends a serial data message to the ECM requesting engine speeds, in response to signals from the PTO switch or remote.
The Diagnostic Trouble Code (DTC) will be set when the Power Take-Off Control Module detects a fault on the PTO engine shutdown control circuit that is above or below a predetermined voltage threshold.

OBDII Code P251F 2014 GMC Sierra - Power Take-Off Engine Shutdown Control Circuit High Voltage - AutoCodes.com — P251F 2014 GMC Sierra Code - Power Take-Off Engine Shutdown Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P251F 2014 GMC Sierra?

Faulty Power Take-Off (PTO) Control Module
Power Take-Off Control Module harness is open or shorted
Power Take-Off Control Module circuit poor electrical connection

How to Fix the DTC P251F 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P251F 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 P251F 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 P251F 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P251F in a 2014 GMC Sierra?

- Common symptoms include the vehicle going into reduced power mode, illuminated check engine light, and potential issues with the power take-off system.

2. What does the OBDII code P251F in a 2014 GMC Sierra indicate?

- The code P251F indicates a high voltage condition in the power take-off engine shutdown control circuit.

3. What are the possible causes of OBDII code P251F in a 2014 GMC Sierra?

- Possible causes include a faulty power take-off engine shutdown control module, damaged wiring or connectors in the circuit, or a malfunctioning power take-off switch.

4. How can I diagnose the OBDII code P251F in my 2014 GMC Sierra?

- Diagnosing the code typically involves using a scan tool to retrieve the code and then inspecting the power take-off system components for any visible damage or loose connections.

5. Can I continue driving my 2014 GMC Sierra with the OBDII code P251F present?

- It is not recommended to continue driving with the code present, as it may lead to further damage to the power take-off system or engine.

6. How can I repair OBDII code P251F in my 2014 GMC Sierra?

- Repairing the issue may involve replacing the power take-off engine shutdown control module, repairing damaged wiring or connectors, or addressing any faults in the power take-off system components.

7. Is resetting the check engine light a sufficient solution for OBDII code P251F in a 2014 GMC Sierra?

- Simply resetting the check engine light may not resolve the underlying issue causing the P251F code. It is important to diagnose and address the root cause of the problem.

8. Can a DIY enthusiast fix the OBDII code P251F in a 2014 GMC Sierra?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the specific components related to the power take-off system may require advanced knowledge and tools.

9. How much can I expect to spend on repairing OBDII code P251F in my 2014 GMC Sierra?

- The cost of repairing the P251F code can vary depending on the exact cause of the issue and whether professional assistance is needed. It is advisable to obtain a diagnosis from a qualified mechanic for an accurate estimate.

10. Will fixing OBDII code P251F improve the performance of my 2014 GMC Sierra?

- Fixing the P251F code is essential to ensure the proper functioning of the power take-off system and overall performance of the vehicle. By addressing the issue promptly, you can prevent further complications and maintain optimal performance.