Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part of the car that helps control how fast something spins isn't working right. It's like a switch that isn't turning on properly.
The Power Take-Off (PTO) system uses sensors to monitor and control its speed. Code P255C indicates that the sensor or switch responsible for monitoring the speed is reporting a low voltage, suggesting a problem in the circuit.
The P255C code is triggered when the Engine Control Module (ECM) detects a low voltage signal from the PTO Speed Selector Sensor/Switch 2. This sensor is part of the PTO system, which is used to transfer power from the engine to auxiliary equipment. A low circuit signal can be due to wiring issues, a faulty sensor, or a malfunctioning switch.
• PTO system not engaging or working properly
• Warning light on the dashboard
• Reduced vehicle performance
• Faulty PTO Speed Selector Sensor/Switch
• Damaged or corroded wiring/connectors
• Malfunctioning Engine Control Module (ECM)
PTO: Power Take-Off, a device that transfers mechanical power from the engine to auxiliary equipment.
ECM: Engine Control Module, the computer that controls engine management functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the PTO Speed Selector Sensor/Switch for proper operation.
• Repair or replace damaged wiring/connectors.
• Replace the faulty PTO Speed Selector Sensor/Switch.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-Series
• Chevrolet Silverado
• Ram 2500
• Regularly inspect PTO system components.
• Keep wiring and connectors clean and dry.
• Perform routine maintenance checks.
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 PTO components.
PTO-related codes have been more common in vehicles used for heavy-duty applications where the PTO system is frequently engaged.
Moderate – While the vehicle may still be drivable, the PTO system may not function properly, affecting auxiliary equipment.
Operating a vehicle with a malfunctioning PTO system can lead to equipment failure and potential safety hazards. Address the issue promptly.
• Vehicle engine running
• PTO system engaged
The PTO Speed Selector Sensor/Switch is typically located near the PTO unit, often attached to the transmission or transfer case.
Q: Can I drive with a P255C code?
A: You can drive, but the PTO system may not work properly, which could affect equipment that relies on it.
Q: How do I reset the P255C code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return.
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