Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there is a problem with a sensor that helps control the speed of a tool attached to the vehicle, like a snowplow or a lawnmower. It's not working right.
The P255B code indicates an issue with the performance or range of the PTO (Power Take-Off) speed selector sensor or switch 2. The sensor is not providing the expected readings to the vehicle's computer.
The PTO speed selector sensor/switch 2 monitors the speed setting of the PTO system. If the sensor/switch does not operate within its expected range or performance parameters, the vehicle's engine control module (ECM) triggers the P255B code.
• Check Engine Light is on
• PTO system not functioning correctly
• Unusual noise from PTO equipment
• Faulty PTO speed selector sensor/switch
• Wiring issues or poor connections
• Malfunctioning ECM
PTO: Power Take-Off, a device that transfers engine power to auxiliary equipment.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the PTO speed selector sensor/switch.
• Test the PTO speed selector sensor/switch for proper operation.
• Replace the faulty PTO speed selector sensor/switch.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect PTO system components.
• Ensure all connections are secure and free of corrosion.
• Perform routine maintenance on PTO equipment.
Sensor Issue
• Avoid using the PTO system until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on the PTO system.
This code has been reported in vehicles with PTO systems, especially those used in commercial and agricultural settings.
Moderate – The vehicle can still be driven, but PTO functions may be limited.
Operating a vehicle with a malfunctioning PTO system can be hazardous. Ensure repairs are made promptly.
• Vehicle engine running
• PTO system engaged
The PTO speed selector sensor/switch is typically located near the PTO unit, which is often at the rear of the vehicle or connected to the transmission.
Q: What is a PTO system?
A: PTO stands for Power Take-Off. It's a system that transfers engine power to auxiliary equipment like a snowplow or a lawnmower.
Q: Can I drive with a P255B code?
A: Yes, but the PTO system may not work correctly, which could affect any attached equipment.
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