What Does P255E Mean?
The PCM is receiving an inconsistent or unstable signal from the secondary PTO speed selector sensor circuit. The signal voltage is fluctuating outside normal parameters, indicating an intermittent electrical fault or failing sensor.
Common Causes
40%
Loose or intermittent connection at sensor connector
30%
Damaged wiring with intermittent short or open
20%
Failing PTO speed selector sensor with intermittent operation
8%
Corroded connector terminals causing intermittent contact
2%
Vibration-induced intermittent ground connection
Diagnostic Steps
1
Step 1: Wiggle test wiring harness and connector while monitoring live sensor data
2
Step 2: Inspect connector for bent pins, corrosion, or poor terminal tension
3
Step 3: Check for chafed or damaged wires along harness routing points
4
Step 4: Monitor sensor voltage over time to capture intermittent dropout or spikes
5
Step 5: Replace sensor if wiring and connections pass all tests
Estimated Repair Cost
$200 - $600
Parts + labor, varies by vehicle and location
The PCM is receiving an inconsistent or unstable signal from the secondary PTO speed selector sensor circuit. The signal voltage is fluctuating outside normal parameters, indicating an intermittent electrical fault or failing sensor.
The most common cause of P255E (PTO Speed Selector Sensor/Switch 2 Circuit Intermittent/Erratic) is: Loose or intermittent connection at sensor connector
Typical repair costs for P255E range from $200 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive but PTO operation may be unreliable or inoperative. Do not rely on PTO system until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P255E to identify the root cause.
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Quick Info
Category
Powertrain
System
Power Take-Off System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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