PTO Control Circuit Low Voltage
The P260B code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the Power Take-Off (PTO) control circuit. This circuit is responsible for engaging and disengaging the PTO system, which is commonly used in trucks and commercial vehicles to power auxiliary equipment. A low voltage reading suggests a short to ground, open circuit, or faulty component in the PTO control wiring or switch.
01. Most Common Causes
- Faulty PTO switch
- Short to ground in PTO control circuit wiring
- Open circuit in PTO control circuit
- Faulty PTO solenoid or actuator
- Corroded or damaged connectors
02. Symptoms You Will Notice
- PTO system fails to engage or disengage
- Check Engine Light illuminated
- PTO operates intermittently
- No response from PTO switch
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for other related codes.
Step 2: Visually inspect the PTO switch, wiring, and connectors for damage, corrosion, or loose connections.
Step 3: Test the PTO switch for proper continuity and voltage supply.
Step 4: Check the PTO solenoid/actuator resistance and compare to manufacturer specifications.
Step 5: Perform a voltage drop test on the control circuit to locate a short or open.
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 system may not function properly. If you rely on the PTO for work, it should be repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause and labor rates.