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P251E 2017 GMC Sierra Code - Power Take-Off Engine Shutdown Control Circuit Low Voltage

Quick Answer

The P251E diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Power Take-Off (PTO) Engine Shutdown Control Circuit having low voltage. Common causes include Faulty PTO Engine Shutdown Control Circuit, Loose or corroded electrical connections in the circuit, Defective PTO switch or control module. 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 PTO Engine Shutdown Control Circuit, Loose or corroded electrical connections in the circuit, Defective PTO switch or control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P251E 2017 GMC Sierra Description

The P251E diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Power Take-Off (PTO) Engine Shutdown Control Circuit having low voltage. In vehicles equipped with PTO systems, this code signifies an issue with the circuit responsible for shutting down the engine when the PTO is engaged. The PTO system allows the engine to power auxiliary equipment such as hydraulic pumps, generators, or compressors.

OBDII Code P251E 2017 GMC Sierra - Power Take-Off Engine Shutdown Control Circuit Low Voltage
P251E 2017 GMC Sierra Code - Power Take-Off Engine Shutdown Control Circuit Low Voltage

Common Causes of P251E 2017 GMC Sierra

  1. Faulty PTO Engine Shutdown Control Circuit.
  2. Loose or corroded electrical connections in the circuit.
  3. Defective PTO switch or control module.
  4. Wiring harness damage or short circuits.
  5. Issues with the vehicle's battery or charging system affecting voltage levels.

Symptoms of P251E 2017 GMC Sierra

  1. Engine stalling or shutting down when the PTO is engaged.
  2. Illumination of the Check Engine Light on the dashboard.
  3. Loss of power or performance when using auxiliary equipment.
  4. Difficulty engaging or disengaging the PTO system.

How to Fix P251E 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the PTO Engine Shutdown Control Circuit, checking for any loose or damaged connections.
  2. Test the PTO switch and control module for proper functionality, replacing them if necessary.
  3. Inspect the wiring harness for any signs of damage or short circuits, repairing or replacing as needed.
  4. Check the vehicle's battery and charging system to ensure they are providing sufficient voltage to the circuit.
  5. Clear the DTC from the vehicle's computer system and test the PTO system to verify that the issue has been resolved.

Cost to Fix P251E 2017 GMC Sierra

The typical repair costs for addressing a P251E code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, parts and labor for this repair could range from $200 to $500. It's essential to consider that diagnosis time and labor rates at auto repair shops can fluctuate based on various factors, so it's advisable to inquire about local rates for a more accurate estimate.

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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.

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