AutoCodes – GMC – P251E 2017 GMC Sierra

P251E 2017 GMC Sierra Code - Power Take-Off Engine Shutdown Control Circuit Low 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: P251E 2017 GMC Sierra indicates Power Take-Off Engine Shutdown Control Circuit Low 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 159

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 P251E 2017 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 P251E 2017 GMC Sierra - Power Take-Off Engine Shutdown Control Circuit Low Voltage - AutoCodes.com — P251E 2017 GMC Sierra Code - Power Take-Off Engine Shutdown Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P251E 2017 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 P251E 2017 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 P251E 2017 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 P251E 2017 GMC Sierra code?

Need more information on how to fix the P251E 2017 GMC Sierra code? Get Access to Factory Service Manuals

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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 P251E 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P251E in a 2017 GMC Sierra?

The common symptoms of OBDII code P251E in a 2017 GMC Sierra include engine stalling, rough idling, reduced power output, and an illuminated check engine light.

2. What does the OBDII code P251E on a 2017 GMC Sierra indicate?

The OBDII code P251E on a 2017 GMC Sierra indicates a low voltage condition in the Power Take-Off Engine Shutdown Control Circuit.

3. What are the possible causes of OBDII code P251E in a 2017 GMC Sierra?

Possible causes of OBDII code P251E in a 2017 GMC Sierra include a faulty power take-off (PTO) switch, damaged wiring or connectors in the control circuit, or a malfunctioning PTO control module.

4. How can I diagnose the OBDII code P251E in my 2017 GMC Sierra?

To diagnose OBDII code P251E in a 2017 GMC Sierra, you can use an OBDII scanner to retrieve the code and then inspect the PTO switch, wiring, and control module for any visible damage or faults.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P251E?

It is not recommended to continue driving your 2017 GMC Sierra with OBDII code P251E, as it can lead to further damage to the vehicle and potentially unsafe driving conditions.

6. How can I repair OBDII code P251E in my 2017 GMC Sierra?

Repairing OBDII code P251E in a 2017 GMC Sierra involves addressing the root cause, which may include replacing the faulty PTO switch, repairing damaged wiring or connectors, or replacing the malfunctioning PTO control module.

7. Is it safe to reset the OBDII code P251E in my 2017 GMC Sierra using an OBDII scanner?

While resetting the OBDII code P251E using an OBDII scanner may temporarily turn off the check engine light, it is important to diagnose and repair the underlying issue causing the code to prevent further problems.

8. Can a DIY enthusiast fix OBDII code P251E in a 2017 GMC Sierra?

Depending on the level of mechanical expertise, a DIY enthusiast may be able to fix OBDII code P251E in a 2017 GMC Sierra by following diagnostic procedures and repair guidelines provided by the vehicle's service manual.

9. How much does it cost to repair OBDII code P251E in a 2017 GMC Sierra at a professional auto repair shop?

The cost of repairing OBDII code P251E in a 2017 GMC Sierra at a professional auto repair shop can vary based on the extent of the damage, parts needed for replacement, and labor costs, but it is advisable to obtain a repair estimate from a trusted mechanic.

10. Will OBDII code P251E in my 2017 GMC Sierra affect the vehicle's performance?

Yes, OBDII code P251E in a 2017 GMC Sierra can affect the vehicle's performance by causing engine stalling, rough idling, and reduced power output, which can impact the overall driving experience and safety.