AutoCodesChevrolet – P251E 2017 Chevrolet Silverado

P251E 2017 Chevrolet Silverado 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 Chevrolet Silverado 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 234
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 21, 2022
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Code P251E 2017 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 engine shutdown control circuit that is above or below a predetermined voltage threshold.
OBDII Code P251E 2017 Chevrolet Silverado - Power Take-Off Engine Shutdown Control Circuit Low Voltage - AutoCodes.com
P251E 2017 Chevrolet Silverado Code - Power Take-Off Engine Shutdown Control Circuit Low Voltage

What are the Possible Causes of the DTC P251E 2017 Chevrolet Silverado?

  • 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 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 P251E 2017 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 P251E 2017 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 P251E 2017 Chevrolet Silverado Code

1. What does the OBDII code P251E mean on a 2017 Chevrolet Silverado?

P251E indicates a low voltage issue in the Power Take-Off (PTO) Engine Shutdown Control Circuit, which is responsible for managing PTO functions, often used in work trucks with auxiliary equipment.

2. What are the common symptoms of code P251E in a Chevrolet Silverado?

Symptoms may include the PTO not engaging or functioning properly, reduced engine performance, warning lights on the dashboard, and potential stalling when using PTO-related functions.

3. What causes code P251E in a 2017 Chevrolet Silverado?

Common causes include a faulty PTO control module, damaged wiring or connectors in the PTO circuit, low battery voltage, or a failing alternator.

4. How do I diagnose code P251E on my Silverado?

Start by checking the PTO wiring and connectors for damage or corrosion. Test the battery voltage and alternator output, and use a scan tool to monitor PTO system parameters.

5. Can a bad PTO control module trigger the P251E code?

Yes, a malfunctioning PTO control module can cause the circuit to have low voltage and trigger the P251E code.

6. Is it safe to drive with a P251E code on my Silverado?

While the truck may still be drivable, using PTO functions could cause further damage. It’s best to avoid heavy PTO use and address the issue promptly.

7. How do I fix a P251E code on a 2017 Chevrolet Silverado?

Repairs may include replacing damaged wiring or connectors, recharging or replacing the battery, repairing the alternator, or replacing the PTO control module if necessary.

8. Can a weak battery cause the P251E code?

Yes, a weak or discharged battery can result in low voltage in the PTO circuit and trigger the P251E code.

9. How much does it cost to repair a P251E code on a Chevrolet Silverado?

Costs vary depending on the cause. Wiring repairs may cost $100–$300, while PTO control module replacement can range from $500–$800, including labor.

10. Can a blown fuse cause the P251E code?

Yes, a blown fuse in the PTO circuit can disrupt voltage and result in the P251E code. Always check fuses during diagnosis.

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