AutoCodes – Chevrolet – P251F Chevrolet

P251F Chevrolet 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 Chevrolet 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 471

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 Chevrolet 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 Chevrolet - Power Take-Off Engine Shutdown Control Circuit High Voltage - AutoCodes.com — P251F Chevrolet Code - Power Take-Off Engine Shutdown Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P251F Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the P251F Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P251F Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P251F 2014 Chevrolet Silverado — Power Take-Off Engine Shutdown Control Circuit High Voltage
P251F 2015 Chevrolet Silverado — Power Take-Off Engine Shutdown Control Circuit High Voltage
P251F 2016 Chevrolet Silverado — Power Take-Off Engine Shutdown Control Circuit High Voltage
P251F 2017 Chevrolet Silverado — Power Take-Off Engine Shutdown Control Circuit High Voltage
P251F 2018 Chevrolet Silverado — Power Take-Off Engine Shutdown Control Circuit High Voltage

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 Chevrolet Code

1. What are the common symptoms of OBDII code P251F in a Chevrolet vehicle?

- Common symptoms include the vehicle going into reduced power mode, engine stalling, and the Power Take-Off (PTO) system not functioning properly.

2. What could cause the Power Take-Off Engine Shutdown Control Circuit High Voltage code P251F in a Chevrolet?

- The code P251F can be triggered by issues such as a faulty power take-off control module, damaged wiring or connectors in the circuit, or a malfunctioning PTO switch.

3. How serious is the OBDII code P251F in a Chevrolet?

- This code is considered serious as it can lead to engine shutdown and loss of power, potentially affecting the vehicle's drivability and safety.

4. Can I continue driving with the P251F code present in my Chevrolet?

- It is not recommended to drive with the P251F code present, as it may lead to unexpected engine shutdown or loss of power while driving.

5. How can I diagnose and repair the P251F code in a Chevrolet?

- Diagnosing and repairing the P251F code typically involves checking the PTO control module, inspecting the wiring and connectors for damage, and testing the PTO switch for proper functionality.

6. Will resetting the OBDII code P251F in a Chevrolet make it go away permanently?

- Simply resetting the code may temporarily clear the warning, but if the underlying issue causing the code is not addressed, it is likely to reappear.

7. Can a DIY enthusiast fix the P251F code in a Chevrolet, or should it be handled by a professional mechanic?

- Depending on your experience and knowledge of automotive systems, you may be able to diagnose and repair the P251F code yourself. However, if you are unsure, it is recommended to seek the help of a professional mechanic.

8. How can I prevent the OBDII code P251F from appearing in my Chevrolet in the future?

- Regular maintenance checks, including inspecting the PTO system components, keeping the wiring in good condition, and addressing any issues promptly, can help prevent the recurrence of the P251F code.

9. Are there any safety precautions to consider when dealing with the P251F code in a Chevrolet?

- When working on the PTO system or related components, always ensure the vehicle is safely supported, the engine is off, and follow proper safety procedures outlined in the vehicle's service manual.

10. Is it possible for the P251F code in a Chevrolet to cause damage to other vehicle systems if left unresolved?

- If left unresolved, the P251F code can potentially cause damage to other engine components due to improper power delivery or engine shutdown, making it important to address the issue promptly.