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C0805 2014 GMC Sierra Code - Control Module Power 2 Circuit

Quick Answer

The C0805 diagnostic trouble code (DTC) for a 2014 GMC Sierra refers to an issue with the Control Module Power 2 Circuit. Common causes include Faulty wiring or connectors in the Control Module Power 2 Circuit, Corrosion or damage to the control module power supply, Defective control module. 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
C0805 2014 GMC Sierra indicates Control Module Power 2 Circuit.
Common causes
Common causes include Faulty wiring or connectors in the Control Module Power 2 Circuit, Corrosion or damage to the control module power supply, Defective control module.
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 15, 2024
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Code C0805 2014 GMC Sierra Description

The C0805 diagnostic trouble code (DTC) for a 2014 GMC Sierra refers to an issue with the Control Module Power 2 Circuit. In modern vehicles, control modules are electronic components that manage various systems such as engine performance, transmission, and emissions control. The Control Module Power 2 Circuit is responsible for providing power to specific control modules in the vehicle. When this circuit malfunctions, it can lead to a variety of issues affecting the vehicle's performance and overall functionality.

OBDII Code C0805 2014 GMC Sierra - Control Module Power 2 Circuit
C0805 2014 GMC Sierra Code - Control Module Power 2 Circuit

Common Causes of C0805 2014 GMC Sierra

  1. Faulty wiring or connectors in the Control Module Power 2 Circuit
  2. Corrosion or damage to the control module power supply
  3. Defective control module
  4. Issues with the vehicle's battery or alternator
  5. Water intrusion or exposure to moisture affecting the circuit

Symptoms of C0805 2014 GMC Sierra

  1. Illumination of the Check Engine Light
  2. Loss of power steering assist
  3. Erratic engine performance
  4. Inoperative climate control system
  5. Failure of certain electronic features such as power windows or door locks

How to Fix C0805 2014 GMC Sierra

  1. Begin by conducting a thorough inspection of the Control Module Power 2 Circuit, checking for any visible damage or corrosion.
  2. Test the power supply to the control modules using a multimeter to identify any voltage irregularities.
  3. Inspect the wiring harness and connectors for signs of wear or damage, repairing or replacing as necessary.
  4. If a faulty control module is identified, it will need to be replaced with a new unit programmed to the vehicle.
  5. Clear the DTC from the vehicle's memory using a diagnostic scan tool after completing the repair to ensure the issue has been resolved.

Cost to Fix C0805 2014 GMC Sierra

The cost of repairing a Control Module Power 2 Circuit issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for addressing a C0805 DTC in a 2014 GMC Sierra could range from $200 to $800. It's important to note that labor rates at auto repair shops can vary, so it's advisable to obtain quotes from local shops for a more accurate estimate.

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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 C0805 2014 GMC Sierra Code

1. What does OBDII code C0805 for a 2014 GMC Sierra mean?

The C0805 code indicates an issue with the Control Module Power 2 Circuit in your GMC Sierra.

2. What are the common symptoms of OBDII code C0805 in a 2014 GMC Sierra?

Common symptoms of the C0805 code may include illuminated warning lights on the dashboard, loss of certain vehicle features, and potential drivability issues.

3. What are the possible causes of OBDII code C0805 in a 2014 GMC Sierra?

Potential causes of the C0805 code can include faulty wiring, a defective control module, poor electrical connections, or a blown fuse related to the power circuit.

4. How serious is the OBDII code C0805 in a 2014 GMC Sierra?

While the severity can vary, it is important to address the C0805 code promptly to prevent further electrical system issues or potential drivability concerns.

5. Can I continue driving my 2014 GMC Sierra with OBDII code C0805?

It is not recommended to continue driving your vehicle with an active C0805 fault code, as unresolved electrical issues can lead to further damage or safety risks.

6. How can I diagnose OBDII code C0805 in my 2014 GMC Sierra?

Diagnosing the C0805 code typically involves using a diagnostic scanner to retrieve the specific details of the fault, followed by inspecting the power circuit components for any visible damage.

7. What repairs are typically needed for OBDII code C0805 in a 2014 GMC Sierra?

Repairing the C0805 code may involve repairing or replacing damaged wiring, addressing faulty connections, replacing the control module if necessary, or ensuring proper fuse functionality.

8. Can I reset the OBDII code C0805 in my 2014 GMC Sierra on my own?

While you can attempt to clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

9. How much does it typically cost to repair OBDII code C0805 in a 2014 GMC Sierra?

The cost of repairing the C0805 code can vary depending on the specific cause of the issue, but it may involve wiring repairs, control module replacement, or other electrical system work.

10. Is it recommended to seek professional help for OBDII code C0805 in a 2014 GMC Sierra?

For accurate diagnosis and proper repair of the C0805 fault code, it is advisable to seek assistance from a qualified mechanic or automotive technician familiar with GMC vehicles.

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