Technical Description of OBD-II Trouble Code
The PTO Sense Circuit is registering a high voltage.
What does that mean?
This is a generic diagnostic trouble code (DTC) that applies to many OBD-II vehicles (1996-newer), including Ford, GMC, Chevy, Dodge, Ram, and others. The exact repair steps may vary depending on the year, make, model, and powertrain configuration.
OBD-II trouble code P253D and related codes P253A, P253B, P253C, and P253E are associated with the PTO or power take off sense circuit.
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 and dump beds.
When the PCM detects a voltage or resistance in the PTO sense circuit that is higher than expected, code P253D will be set and the check engine light or service engine soon light, or both, may illuminate.
What is the severity of this DTC?
This code is generally not severe as it usually only affects the functionality of the PTO equipment and not the regular vehicle functions.
What are some of the symptoms of the code?
Symptoms of a P253D trouble code may include:
What are some of the common causes of the code?
Possible causes for this P253D code may include:
What are some P253D troubleshooting steps?
The first step in troubleshooting any malfunction is to research the Technical Service Bulletins (TSB’s) for the specific vehicle based on its year, model, and engine/transmission configuration. This can save time by providing guidance in the right direction.
The second step is to inspect all components associated with the PTO power take-off circuit for any obvious physical damage. Conduct a thorough visual inspection of the wiring for defects such as scraping, rubbing, bare wires, or burn spots. Check the connectors and connections for security, corrosion, and damaged pins. This includes all wiring connectors and connections to the PCM. Consult the vehicle’s technical 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 specific to each vehicle and require advanced equipment for accurate performance. These procedures involve using a digital multimeter and referencing the vehicle’s technical documentation. In this situation, an oil pressure gauge may aid in the troubleshooting process.
This article is for informational purposes only, and the specific technical data and service bulletins for your vehicle should always take precedence.
