AutoCodes – Chevrolet – P251A 2015 Chevrolet Silverado

P251A 2015 Chevrolet Silverado Code - Power Take-Off Enable Switch Circuit

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) Enable Switch, Power Take Off Enable Switch harness is open or shorted, Power Take Off Enable Switch 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: P251A 2015 Chevrolet Silverado indicates Power Take-Off Enable Switch Circuit.
Common causes: Common causes include Faulty Power Take Off (PTO) Enable Switch, Power Take Off Enable Switch harness is open or shorted, Power Take Off Enable Switch 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 255

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P251A 2015 Chevrolet Silverado 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 enable switch circuit that is above or below a predetermined voltage threshold.

OBDII Code P251A 2015 Chevrolet Silverado - Power Take-Off Enable Switch Circuit - AutoCodes.com — P251A 2015 Chevrolet Silverado Code - Power Take-Off Enable Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P251A 2015 Chevrolet Silverado?

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

How to Fix the DTC P251A 2015 Chevrolet Silverado?

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 P251A 2015 Chevrolet Silverado 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 P251A 2015 Chevrolet Silverado code?

Need more information on how to fix the P251A 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P251A 2015 Chevrolet Silverado 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 P251A 2015 Chevrolet Silverado Code

1. What does OBDII code P251A mean for a 2015 Chevrolet Silverado?

The P251A code indicates a problem with the Power Take-Off (PTO) Enable Switch Circuit in the vehicle.

2. What are the common symptoms of OBDII code P251A in a 2015 Chevrolet Silverado?

Common symptoms of P251A may include illuminated warning lights on the dashboard, issues with engaging the power take-off system, and potential engine performance concerns.

3. What are the possible causes of OBDII code P251A in a 2015 Chevrolet Silverado?

Potential causes of the P251A code can include a faulty PTO enable switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.

4. How can I diagnose the Power Take-Off Enable Switch Circuit issue related to OBDII code P251A in a 2015 Chevrolet Silverado?

Diagnosing the P251A code may involve visually inspecting the PTO enable switch and its wiring, testing the switch for proper functionality, and using a diagnostic scanner to check for related errors in the system.

5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P251A present?

It is not recommended to continue driving the vehicle with the P251A code active, as it may lead to further damage or safety concerns related to the power take-off system.

6. How can I repair OBDII code P251A in a 2015 Chevrolet Silverado?

Repairing the P251A code may involve replacing the faulty PTO enable switch, repairing damaged wiring or connectors, or reprogramming the control module as needed.

7. Is it possible to reset the OBDII code P251A in a 2015 Chevrolet Silverado without fixing the underlying issue?

While you can clear the code with a diagnostic scanner, it is not advisable to do so without addressing the root cause, as the problem may persist and trigger the code again.

8. Are there any safety precautions to consider when working on the Power Take-Off Enable Switch Circuit for OBDII code P251A in a 2015 Chevrolet Silverado?

When working on electrical components like the PTO enable switch circuit, ensure the vehicle is turned off, and take precautions to prevent accidental short circuits or damage to the system.

9. Can weather or environmental factors contribute to triggering OBDII code P251A in a 2015 Chevrolet Silverado?

Extreme weather conditions or exposure to moisture can potentially affect the PTO enable switch circuit, leading to issues that trigger the P251A code.

10. How long does it typically take to repair OBDII code P251A in a 2015 Chevrolet Silverado?

The repair time for the P251A code can vary depending on the specific issue identified, but it may take anywhere from a few hours to a full day for diagnosis and repair.