PTO Speed Selector Sensor/Switch 2 Circuit Low
The P255C code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the circuit of the PTO (Power Take-Off) speed selector sensor or switch 2. This sensor/switch is used to select the desired PTO speed and sends a signal to the PCM. A low voltage reading suggests a short to ground, open circuit, or faulty sensor/switch, which can prevent proper PTO operation.
01. Most Common Causes
- Faulty PTO speed selector sensor/switch 2
- Short to ground in the sensor circuit
- Open circuit or damaged wiring/connectors
- Corroded or loose electrical connections
- Failed PCM (rare)
02. Symptoms You Will Notice
- PTO inoperative or erratic operation
- Check Engine Light illuminated
- Inability to select PTO speed
- PTO may engage but not respond to speed selection
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
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 shorts to ground or open circuits in the wiring harness using a multimeter.
Step 5: If all tests pass, suspect a faulty PCM and perform further diagnostics.
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 properly. If you rely on the PTO for work, it should be repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on the cause and vehicle model.