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AutoCodes – GMC – P260C GMC

P260C GMC Code - Power Take-Off Relay Control Circuit High Voltage

Quick Answer

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P260C GMC indicates Power Take-Off Relay Control Circuit High Voltage.
Common causes
Common causes include Faulty Power Take-Off (PTO) Control Module, Power Take-Off Control Module harness is open or shorted, Power Take-Off Control Module circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 610
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Sep 21, 2022
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Code P260C GMC Description

The Power Take-Off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source. The PTO system specifically controls engine speed to values higher than normal base idle, PTO load relay engagement, and remote starting and shutdown of the engine. When the operator requests PTO using either the PTO switch or PTO remote, the engine RPM will increase to a default standby speed. The Engine Control Module (ECM) converts the data from the engine speed sensor to a 2 pulses/engine revolution signal. When PTO is engaged, the power take-off control module sends a serial data message to the ECM requesting engine speeds, in response to signals from the PTO switch or remote. The Diagnostic Trouble Code (DTC) will be set when the power take-off control module detects a fault on the PTO relay coil control circuit that is above or below a predetermined voltage threshold.
OBDII Code P260C GMC - Power Take-Off Relay Control Circuit High Voltage - AutoCodes.com
P260C GMC Code - Power Take-Off Relay Control Circuit High Voltage
What does this mean?

What are the Possible Causes of the DTC P260C GMC?

  • Faulty Power Take-Off (PTO) Control Module
  • Power Take-Off Control Module harness is open or shorted
  • Power Take-Off Control Module circuit poor electrical connection

How to Fix the DTC P260C GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P260C GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P260C GMC code?

Need more information on how to fix the P260C GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P260C GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P260C GMC Code

1. What does the OBDII code P260C mean on a GMC?

The P260C code indicates a high voltage issue in the Power Take-Off (PTO) Relay Control Circuit, which is used to control auxiliary equipment like hydraulic systems or generators.

2. What are the common symptoms of P260C on a GMC vehicle?

Symptoms may include the check engine light turning on, malfunctioning PTO equipment, or reduced functionality of auxiliary systems.

3. What causes the P260C code to trigger?

Common causes include a faulty PTO relay, damaged wiring or connectors in the PTO circuit, or issues with the Powertrain Control Module (PCM).

4. How can I diagnose a P260C code on a GMC?

Start by inspecting the PTO relay, wiring, and connectors for damage or corrosion. Then, use a multimeter to check for high voltage in the circuit and verify PCM functionality.

5. Can a faulty PTO relay cause the P260C code?

Yes, a malfunctioning PTO relay can cause the circuit to produce high voltage, triggering the P260C code.

6. Is it safe to drive with a P260C code on a GMC?

It’s generally safe to drive, but auxiliary systems relying on the PTO may not function correctly, which could be critical for work-related tasks.

7. How do I fix the P260C code on my GMC?

Repair or replace damaged wiring, connectors, or the PTO relay, and update or reprogram the PCM if necessary.

8. How much does it cost to fix the P260C code?

Repair costs can range from $50 to $300 depending on whether you need to replace the PTO relay, repair wiring, or address PCM issues.

9. Can a low battery cause the P260C code?

While uncommon, electrical issues like a weak battery or poor ground connections could potentially affect the PTO circuit and cause this code.

10. Do I need to clear the P260C code after repairs?

Yes, after completing repairs, use an OBDII scanner to clear the code and verify that it does not return during a test drive.

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