PTO Enable Switch Performance
The PTO enable switch is electrically intact but its state does not match operating conditions — for example asserted while the vehicle is rolling above the PTO speed limit, or asserted/de-asserted in fast succession. The ECM rejects the request to avoid unsafe PTO engagement.
Affected components
- Pto enable switch
Common causes
- High likelihood: Switch contact bounce
- Medium likelihood: Switch operated while vehicle is moving
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.