P253A

What it means

The PTO sense (engagement feedback) line is open. This input tells the ECM whether the PTO clutch or driveline is actually engaged after a request — it closes the loop on the PTO enable command. With it broken, the ECM cannot confirm engagement and refuses to ramp up to PTO speed setpoints.

Is it safe to drive?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

• Open sense wire

  high

  One of the most commonly reported causes for this code — check this first.

• Pin pushed back out of connector body

  low

  Less common, but worth ruling out after the more likely causes.

• Cracked solder joint inside the module or sensor

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full P253A diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?