AutoCodesChevrolet – C0805 2018 Chevrolet Silverado

C0805 2018 Chevrolet Silverado Code - Control Module Power 2 Circuit

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Battery voltage, Faulty Control Module, Control Module harness is open or shorted. 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 2018 Chevrolet Silverado indicates Control Module Power 2 Circuit.
Common causes
Common causes include Battery voltage, Faulty Control Module, Control Module harness is open or shorted.
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 218
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 13, 2022
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Code C0805 2018 Chevrolet Silverado Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Damage to components, and incorrect data can occur when the voltage is out of range. The vehicle has multiple Control Modules that will set this Diagnostic Trouble Code (DTC).
OBDII Code C0805 2018 Chevrolet Silverado - Control Module Power 2 Circuit - AutoCodes.com
C0805 2018 Chevrolet Silverado Code - Control Module Power 2 Circuit

What are the Possible Causes of the DTC C0805 2018 Chevrolet Silverado?

  • Battery voltage
  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC C0805 2018 Chevrolet Silverado?

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 C0805 2018 Chevrolet Silverado 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 C0805 2018 Chevrolet Silverado code?

Need more information on how to fix the C0805 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2018 Chevrolet Silverado Code

1. What does the OBDII code C0805 mean on a 2018 Chevrolet Silverado?

The C0805 code indicates an issue with the Control Module Power 2 Circuit, suggesting a problem with the power supply to one of the vehicle's control modules.

2. What are common symptoms of the C0805 code in a 2018 Silverado?

Common symptoms include warning lights on the dashboard, intermittent electrical issues, or certain systems like ABS or traction control not functioning correctly.

3. What causes the C0805 code to appear on a Chevrolet Silverado?

The code can be triggered by issues like loose or corroded wiring, a blown fuse, a faulty control module, or a weak battery.

4. How can I diagnose the C0805 code on my 2018 Silverado?

Start by checking the wiring and connectors for corrosion or damage, test the relevant fuses, and ensure the battery voltage is within the proper range.

5. Can a weak battery cause the C0805 code in a Chevy Silverado?

Yes, a weak or failing battery can result in insufficient power to the control module, triggering the C0805 code.

6. Is it safe to drive with the C0805 code on a 2018 Chevrolet Silverado?

It’s not recommended, as the code may indicate critical power supply issues, potentially affecting important vehicle systems like brakes or steering.

7. How do I fix the C0805 code on my 2018 Silverado?

Repairs may include replacing damaged wiring, cleaning corroded connectors, replacing a blown fuse, or addressing a failing control module or battery.

8. What tools are needed to troubleshoot the C0805 code?

You’ll need an OBDII scanner, a multimeter to test voltage and continuity, and possibly wiring diagrams for your Silverado.

9. Can a software issue cause the C0805 code?

In rare cases, a software glitch in the control module could cause the code, requiring a module reprogramming or update from a dealership.

10. How much does it cost to repair the C0805 code on a 2018 Chevrolet Silverado?

Repair costs vary depending on the issue but may range from $50 for a fuse replacement to several hundred dollars if a control module or extensive wiring repairs are needed.

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