What Does P260C Mean?
The PCM detected abnormally high voltage in the PTO control circuit. This suggests a short to power in the wiring, a failed relay stuck closed, or an internal control module fault affecting PTO system operation.
Common Causes
35%
PTO control wiring shorted to battery voltage
30%
Failed PTO relay stuck in closed position
20%
Damaged PTO switch with internal short to power
10%
Corroded connector causing voltage backfeed
5%
Faulty PCM with internal short in driver circuit
Diagnostic Steps
1
Step 1: Disconnect PTO switch and check for voltage at PCM control wire; should read 0 volts with ignition on
2
Step 2: Remove PTO relay and check for voltage on control side terminals; identify source of unwanted voltage
3
Step 3: Inspect PTO wiring harness for damage where it may contact power sources or chafing against hot surfaces
4
Step 4: Test PTO relay contacts with ohmmeter; verify relay opens properly and contacts don't remain closed when de-energized
5
Step 5: Measure voltage at PCM connector terminal for PTO control circuit with all components disconnected
Estimated Repair Cost
$130 - $550
Parts + labor, varies by vehicle and location
The PCM detected abnormally high voltage in the PTO control circuit. This suggests a short to power in the wiring, a failed relay stuck closed, or an internal control module fault affecting PTO system operation.
The most common cause of P260C (PTO Control Circuit High) is: PTO control wiring shorted to battery voltage
Typical repair costs for P260C range from $130 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause unexpected PTO engagement which could be dangerous. Verify PTO is mechanically disengaged and address immediately before operating attached equipment.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P260C 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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