P260B

Code

Generic P — Powertrain

PTO Control Circuit Low

Brand: Generic

Type: P — Powertrain

Views: UK: 24 EN: 45 RU: 25

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PTO will not engage when commanded
Related accessory (pump, hydraulic control) not powered or intermittently powers
Illuminated MIL or PTO indicator lamp
Stored DTC P260B (may be accompanied by related PTO or relay codes)

Verify customer complaint and attempt to reproduce with vehicle in same state as when code occurred
Visually inspect PTO relay, actuator, connectors, wiring harness for damage, corrosion, pin-back, melting or aftermarket splices
Check relevant fuses and fusible links for proper continuity
Backprobe/monitor PCM PTO control pin while commanding PTO on and off with a scan tool
Perform a wiggle-test on harnesses and connectors while commanding PTO to observe intermittent changes

Expected: control output near battery voltage (~12 V nominal) when PCM commands PTO ON (may be steady or PWM depending on vehicle)
Expected: control output ≈ 0 V when PCM commands PTO OFF
If circuit is PWM, duty cycle varies from 0% (OFF) to near 100% (ON) depending on control strategy
Actuator/relay coil resistance: vehicle-specific — commonly in the low ohms to tens of ohms (measure and compare to spec)
Clamp current: PTO actuator may draw moderate current — verify with manufacturer spec or measure during activation

Retrieve freeze-frame and readiness data; record any additional codes
Inspect connectors, wiring, and fuses for physical damage, corrosion, melted insulation or aftermarket splices; repair any obvious faults
With key ON (engine off) and scan tool, command PTO ON while monitoring PCM control pin voltage; note voltage and behavior (steady vs PWM)
If control output is low while commanded ON, disconnect the PTO actuator/relay coil and measure control pin again while commanding ON. If voltage returns to expected, suspect short/low resistance in actuator or downstream wiring
Measure coil or actuator resistance (with power removed). If resistance is abnormally low (short) or open, replace actuator/relay
If actuator and wiring appear good, backprobe the relay socket and check supply voltage and ground to the relay coil and switched circuit; repair any supply/ground issues
If wiring and actuator are good but the PCM output remains low when commanded, consult wiring diagram and consider bench-testing or replacing the PCM (only after verifying all external faults are cleared)
Clear codes and re-test to confirm repair. Check for intermittent faults by cycling PTO several times and road-testing if applicable