Technical Description of OBD-II Trouble Code
Intermittent or Erratic PTO Speed Selector Sensor/Switch 2
What does that signify?
This is a generic diagnostic trouble code (DTC) that pertains to various OBD-II vehicles (1996-newer), including but not limited to Ford, GMC, Chevy, Dodge, Ram, etc. Although it is a generic code, the specific repair steps may vary depending on the year, make, model, and powertrain configuration of the vehicle.
OBD-II trouble code P255E and its related codes P255A, P255B, P255C, and P255D are associated with the circuit of the PTO or power take off speed selector sensor/switch 2.
The PTO or power take-off is a system connected to the vehicle’s transmission and is used to operate auxiliary equipment such as snow plows, dump beds, etc.
When the PCM detects an intermittent or erratic voltage or resistance signal within the circuit of the PTO speed selector sensor/switch 2, it will set code P255E and may illuminate the check engine light, service engine soon light, or both.
What is the severity of this DTC?
This code is generally not severe as it is likely to only affect the functioning of PTO equipment and not regular vehicle functions.
What are some of the symptoms of the code?
Symptoms of a P255E trouble code may include:
What are some of the common causes of the code?
Possible causes for this P255E code may include:
What are some P255E troubleshooting steps?
The first step in troubleshooting any malfunction is to research the Technical Service Bulletins (TSB’s) specific to the vehicle’s year, model, and engine/transmission configuration. This can save time by providing guidance in the right direction.
The second step is to locate all components associated with the PTO power take-off circuit and visually inspect them for any obvious physical damage. Check the wiring for defects such as scraping, rubbing, bare wires, or burn spots. Also, inspect the connectors and connections for security, corrosion, and damaged pins. This inspection should include all wiring connectors and connections to all components, including the PCM. Consult the vehicle’s specific tech data to verify the configuration of the oil level safety circuit and determine if a fuse or fuse-able link is part of the circuit.
Advanced Steps
The advanced steps are highly vehicle-specific and require specialized equipment, such as a digital multimeter, and the specific technical references for the vehicle. In this situation, an oil pressure gauge may be helpful for troubleshooting.
This article is purely informational, and the specific technical data and service bulletins for your vehicle should always take precedence.
