AutoCodes – GMC – C0800 GMC

C0800 GMC Code - Control Module Power 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 Faulty Control Module Power, Control Module Power harness is open or shorted, Control Module Power 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: C0800 GMC indicates Control Module Power Circuit.
Common causes: Common causes include Faulty Control Module Power, Control Module Power harness is open or shorted, Control Module Power 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 14,318

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 23, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0800 GMC Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. The Powertrain Control Module (PCM) sets the OBDII code when the system voltage is not to factory specifications. The following control modules will set this Diagnostic Trouble Code (DTC): Body Control Module (BCM), Instrument Panel Cluster (IPC), Radio and Sensing and Diagnostic Module (SDM).

OBDII Code C0800 GMC - Control Module Power Circuit - AutoCodes.com — C0800 GMC Code - Control Module Power Circuit

What does this mean?

What are the Possible Causes of the DTC C0800 GMC?

Faulty Control Module Power
Control Module Power harness is open or shorted
Control Module Power circuit poor electrical connection

How to Fix the DTC C0800 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 does this mean?

Code Tech Notes

- C0800:03 Control Module Power Circuit Low Voltage
- C0800:07 Control Module Power Circuit High Voltage
- C0800:0D Control Module Power Circuit High Resistance
- C0800:11 Control Module Power Circuit High Input

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0800 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 C0800 GMC code?

Need more information on how to fix the C0800 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0800 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

C0800 2014 GMC Sierra — Control Module Power Circuit
C0800 2015 GMC Sierra — Control Module Power Circuit
C0800 2016 GMC Sierra — Control Module Power Circuit
C0800 2017 GMC Sierra — Control Module Power Circuit
C0800 2018 GMC Sierra — Control Module Power Circuit

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 C0800 GMC Code

1. What are common symptoms of OBDII code C0800 GMC related to the Control Module Power Circuit?

- Common symptoms include illuminated Check Engine Light, loss of power steering, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code C0800 GMC?

- The code C0800 GMC can be triggered by issues such as a faulty control module, wiring issues, blown fuses, or a weak battery.

3. How can I diagnose OBDII code C0800 GMC?

- Diagnosing this code typically involves using a scan tool to retrieve the code, checking the power supply to the control module, and inspecting the wiring for any damage.

4. What should I check first when troubleshooting OBDII code C0800 GMC?

- Start by checking the condition of the fuses related to the control module power circuit, as a blown fuse can often be the culprit.

5. Can a weak battery cause OBDII code C0800 GMC to appear?

- Yes, a weak or failing battery can lead to voltage fluctuations in the control module power circuit, triggering the C0800 code.

6. How can I repair OBDII code C0800 GMC on my GMC vehicle?

- Repairing this code may involve replacing a faulty control module, repairing damaged wiring, replacing blown fuses, or addressing any underlying battery issues.

7. Is it safe to continue driving with OBDII code C0800 GMC present?

- It is not recommended to continue driving with this code present, as it can lead to further electrical issues and potential safety hazards.

8. Can a DIY enthusiast fix OBDII code C0800 GMC, or should it be done by a professional mechanic?

- Depending on the root cause of the code, some repairs related to OBDII code C0800 GMC can be done by a DIY enthusiast with sufficient knowledge and tools. However, complex issues may require the expertise of a professional mechanic.

9. How much does it typically cost to repair OBDII code C0800 GMC?

- The cost of repairing OBDII code C0800 GMC can vary widely depending on the underlying issue, but it may range from a few hundred to over a thousand dollars.

10. Will resetting the OBDII system clear the C0800 code?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the C0800 code is not addressed, the code is likely to reappear.