PTO Speed Selector Sensor/Switch 2 Circuit/Open
The P255A code indicates an open circuit in the Power Take-Off (PTO) speed selector sensor/switch 2 circuit. This sensor monitors the PTO speed and position, and an open circuit means the PCM detects no voltage or signal from the sensor. This can prevent the PTO from engaging or disengaging properly, affecting auxiliary equipment operation.
01. Most Common Causes
- Faulty PTO speed selector sensor/switch 2
- Open or shorted wiring in the sensor circuit
- Corroded or damaged connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- PTO does not engage or disengage
- Check Engine Light illuminated
- PTO operates erratically
- No PTO speed reading on dashboard
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the PTO sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage supply per manufacturer specifications.
Step 4: Check for continuity in the circuit between the sensor and PCM.
Step 5: If all else is good, replace the sensor and clear codes.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive, but the PTO may not function correctly. If you rely on the PTO for work, it should be repaired promptly.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the sensor cost and accessibility.