P253E Unstable / unstable power take-off sensor circuit

P253E Unstable / unstable power take-off sensor circuit

OBD-II DTC Datasheet

The power take-off sensor circuit is fuzzy / unstable

What does this mean?

This is a generic powertrain diagnostic trouble code (DTC) applicable to many OBD-II vehicles (1996 and newer). This may include, but is not limited to, Ford, GMC, Chevy, Dodge, Ram, etc. Despite the general nature, the exact repair steps may vary depending on the model year, make, model, and transmission configuration.

OBD-II DTC P253E and associated codes P253A, P253B, P253C, and P253D are associated with the PTO or PTO circuit.

A power take-off or power take-off is a system that is connected to a vehicle's transmission and is used to drive auxiliary equipment. This accessory may include things like snow plows, blades, etc.

When the PCM detects an intermittent or intermittent voltage or resistance signal on the PTO sensor circuit, P253E will set and the check engine light, service engine light, or both may illuminate.

What is the severity of this DTC?

The severity level of this code is generally not serious as it will likely only affect PTO functions and not normal vehicle functions.

What are some of the symptoms of the code?

Symptoms of a P253E DTC may include:

• PTO accessories will not work
• Check engine light is on

What are some of the common causes for the code?

Reasons for this P253E code may include:

• PTO sensor defective
• Faulty or damaged wiring
• Corroded, damaged or loose connector
• Defective fuse or jumper (if applicable)
• Defective PCM

What are some of the P253E troubleshooting steps?

The first step in troubleshooting any problem is to review the vehicle-specific Technical Service Bulletins (TSBs) by year, engine / transmission model, and configuration. In some cases, this can save you a lot of time in the long run by pointing you in the right direction.

The second step is to locate all components associated with the PTO power take-off circuit and look for obvious physical damage. Perform a thorough visual inspection to check the associated wiring for obvious defects such as scratches, abrasions, exposed wires, or burn marks. Next, check the connectors and connections for security, corrosion and damage to the contacts. This process should include all electrical connectors and connections to all components including the PCM. Consult the vehicle specific data sheet to check the oil level safety circuit configuration and see if there is a fuse or fusible link in the circuit.

Advanced steps

The additional steps become very vehicle specific and require appropriate advanced equipment to be performed accurately. These procedures require a digital multimeter and vehicle-specific technical reference documents. In this situation, an oil pressure gauge can facilitate the troubleshooting process.

This article is for informational purposes only and specific technical data and service bulletins for your vehicle should always take priority.

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