PTO Engine Shutdown Circuit High
The PTO engine-shutdown command line reads stuck high — typically a short to battery voltage. The ECM cannot pulse the line low to acknowledge a shutdown request, so the operator-side safety chain is effectively disabled.
Affected components
- Pto shutdown circuit
Common causes
- High likelihood: Shutdown wire shorted to battery voltage
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Supply wire pinched against B+ source
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.