What are the common causes of P251F?

A PTO engine shutdown wire shorted to voltage. An open in the PTO engine shutdown circuit. A failed PTO control module. Incorrect PTO system calibration.

Read the PTO engine shutdown status on a scan tool. Test the PTO engine shutdown wire for a short to voltage. Check the PTO engine shutdown circuit for an open. Verify the PTO system calibration. Replace the PTO control module if the circuit tests good. Clear the code and retest.

P251F

PTO Engine Shutdown Circuit High

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P251F means PTO Engine Shutdown Circuit High.

Check these first

A PTO engine shutdown wire shorted to voltage
An open in the PTO engine shutdown circuit
A failed PTO control module
Incorrect PTO system calibration

What to do next

Read the PTO engine shutdown status on a scan tool
Test the PTO engine shutdown wire for a short to voltage
Check the PTO engine shutdown circuit for an open
Verify the PTO system calibration
Replace the PTO control module if the circuit tests good
Clear the code and retest

Look up another code

Code or symptom

Enter a full code or a symptom. Press / to search. How to read a code

Type a code above, or start from a symptom or a common code.

Updated

Generic SAE J2012 definition. Last updated 2026-10-10.