PTO Speed Selector Sensor/Switch 2 Circuit Intermittent/Erratic
The P255E code indicates that the Powertrain Control Module (PCM) has detected an intermittent or erratic signal from the PTO (Power Take-Off) speed selector sensor/switch 2 circuit. This sensor monitors the speed of the PTO shaft or the position of the PTO selector switch. An intermittent signal can be caused by a faulty sensor, damaged wiring, or poor electrical connections. This issue is common in vehicles equipped with PTO systems, such as trucks and commercial vehicles.
01. Most Common Causes
- Faulty PTO speed selector sensor/switch 2
- Damaged or corroded wiring/connectors in the sensor circuit
- Intermittent short or open in the circuit
- Faulty PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- PTO system may not engage or disengage properly
- Erratic PTO speed readings
- Reduced vehicle performance when PTO is active
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the PTO speed selector sensor/switch 2 and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor/switch resistance and voltage according to manufacturer specifications.
Step 4: Check for intermittent issues by wiggling the wiring harness while monitoring the signal with a multimeter or scan tool.
Step 5: If all else fails, replace the sensor/switch and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the PTO system may not function correctly. If the PTO is critical for your work, have it repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and the specific sensor/switch location.