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U0117 GMC Code - Lost Communication With Power Take-Off Control Module

Quick Answer

The U0117 GMC code indicates that there has been a communication failure between the vehicle's onboard computer system and the Power Take-Off (PTO) Control Module. Common causes include Faulty wiring connections between the onboard computer and the PTO Control Module, A damaged or malfunctioning PTO Control Module, Software issues in the vehicle's onboard computer system. 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
U0117 GMC indicates Lost Communication With Power Take-Off Control Module.
Common causes
Common causes include Faulty wiring connections between the onboard computer and the PTO Control Module, A damaged or malfunctioning PTO Control Module, Software issues in the vehicle's onboard computer system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code U0117 GMC Description

The U0117 GMC code indicates that there has been a communication failure between the vehicle's onboard computer system and the Power Take-Off (PTO) Control Module. The PTO Control Module is responsible for managing the power take-off system, which is commonly found in trucks and other heavy-duty vehicles. This system allows the engine to power auxiliary equipment such as hydraulic pumps, winches, or generators.

OBDII Code U0117 GMC - Lost Communication With Power Take-Off Control Module
U0117 GMC Code - Lost Communication With Power Take-Off Control Module

Common Causes of U0117 GMC

  1. Faulty wiring connections between the onboard computer and the PTO Control Module.
  2. A damaged or malfunctioning PTO Control Module.
  3. Software issues in the vehicle's onboard computer system.
  4. Corrosion or water damage in the communication network.
  5. Electrical interference from other components in the vehicle.

Symptoms of U0117 GMC

  1. Inability to engage or disengage the power take-off system.
  2. Warning light on the dashboard indicating a communication error.
  3. Loss of power or performance when using auxiliary equipment.
  4. Unusual noises or vibrations coming from the power take-off system.

How to Fix U0117 GMC

  1. Begin by conducting a thorough inspection of the wiring connections between the onboard computer and the PTO Control Module. Repair or replace any damaged wires or connectors.
  2. Test the PTO Control Module for functionality and replace it if necessary.
  3. Use diagnostic tools to scan the vehicle's onboard computer system for any software glitches or communication errors. Reset the system if needed.
  4. Check for any signs of corrosion or water damage in the communication network and address these issues accordingly.
  5. Test the power take-off system to ensure that communication has been restored and that the auxiliary equipment functions properly.

Cost to Fix U0117 GMC

The typical repair costs for addressing a U0117 GMC code can vary depending on the specific cause of the communication failure. In general, parts and labor for this type of repair can range from $200 to $500. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to obtain local estimates for a more accurate cost assessment.

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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 U0117 GMC Code

1. What does the OBDII code U0117 mean on a GMC vehicle?

The U0117 code indicates a loss of communication with the Power Take-Off (PTO) Control Module, which manages auxiliary functions like powering hydraulic systems.

2. What are the common symptoms of code U0117 on a GMC?

Symptoms may include warning lights on the dashboard, inoperable PTO equipment, reduced vehicle functionality, or no noticeable issues depending on the system's usage.

3. What causes the U0117 code to appear on a GMC?

Common causes include a faulty PTO Control Module, damaged wiring or connectors, a blown fuse, or issues with the Controller Area Network (CAN) communication system.

4. Can I drive my GMC with a U0117 code?

Yes, you can usually drive the vehicle, but PTO-related systems may not function properly, and ignoring the issue could lead to further complications.

5. How do you diagnose the U0117 code on a GMC?

Diagnosis involves checking the PTO Control Module for faults, inspecting the CAN wiring and connectors, testing the fuses, and verifying module communication using a scan tool.

6. How do you fix the U0117 code on a GMC?

Repairs may include replacing or repairing damaged wiring, reconnecting loose connectors, replacing a blown fuse, or replacing the PTO Control Module if it’s defective.

7. What tools are needed to troubleshoot the U0117 code?

You’ll need an advanced OBDII scan tool capable of reading CAN communication data, a multimeter for electrical testing, and potentially a wiring diagram for your vehicle.

8. How much does it cost to repair the U0117 code on a GMC?

Repair costs vary depending on the issue, ranging from $50 for wiring repairs to $500 or more if the PTO Control Module needs replacement.

9. Can a software issue cause the U0117 code on a GMC?

Yes, outdated or corrupted software in the PTO Control Module or related systems can cause communication loss and trigger the code.

10. Does the U0117 code require module reprogramming after repairs?

In some cases, reprogramming or resetting the PTO Control Module may be necessary after replacing the module or repairing communication issues.

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