AutoCodes – Chevrolet – P251A 2016 Chevrolet Silverado

P251A 2016 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 2016 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.

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Code Popularity 241

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 P251A 2016 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 2016 Chevrolet Silverado - Power Take-Off Enable Switch Circuit - AutoCodes.com — P251A 2016 Chevrolet Silverado Code - Power Take-Off Enable Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P251A 2016 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 2016 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 2016 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 2016 Chevrolet Silverado 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 P251A 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P251A in a 2016 Chevrolet Silverado?

- Common symptoms include the inability to engage the power take-off (PTO) system, illuminated warning lights on the dashboard, and potential loss of power while driving.

2. What does the OBDII code P251A in a 2016 Chevrolet Silverado indicate?

- The P251A code specifically relates to a malfunction in the Power Take-Off Enable Switch Circuit.

3. What are the possible causes of OBDII code P251A in a 2016 Chevrolet Silverado?

- The code may be triggered by issues such as a faulty PTO enable switch, damaged wiring or connectors in the circuit, or a defective PTO control module.

4. How can I diagnose the Power Take-Off Enable Switch Circuit issue in my 2016 Chevrolet Silverado?

- Diagnosing the problem involves checking the PTO enable switch, inspecting the wiring and connectors for damage, and using an OBDII scanner to read and clear the code.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P251A present?

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

6. How can I repair OBDII code P251A in my 2016 Chevrolet Silverado?

- Repair options include replacing the faulty PTO enable switch, repairing damaged wiring or connectors, or replacing the PTO control module as needed.

7. Is it possible to reset the OBDII code P251A in a 2016 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

8. Does the repair of OBDII code P251A in a 2016 Chevrolet Silverado require specialized tools or expertise?

- Depending on the exact cause of the issue, repairing P251A may require basic automotive tools and intermediate DIY skills, or it may be best handled by a professional mechanic.

9. Are there any preventive maintenance tips to avoid OBDII code P251A in a 2016 Chevrolet Silverado?

- Regularly checking the PTO system components for signs of wear or damage, and addressing any issues promptly, can help prevent the occurrence of code P251A.

10. Can a malfunction related to OBDII code P251A affect the overall performance of a 2016 Chevrolet Silverado?

- Yes, as the power take-off system plays a crucial role in certain operations of the vehicle, a malfunction related to P251A can impact the overall performance and functionality of the Silverado.