C0800 2018 GMC Sierra 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 2018 GMC Sierra 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.
Code C0800 2018 GMC Sierra Description
What are the Possible Causes of the DTC C0800 2018 GMC Sierra?
- 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 2018 GMC Sierra?
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.
Code Tech Notes
- 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 2018 GMC Sierra 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 2018 GMC Sierra code?
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Frequently Asked Questions about C0800 2018 GMC Sierra Code
1. What does the OBDII code C0800 mean on a 2018 GMC Sierra?
C0800 indicates an issue with the Control Module Power Circuit, often related to low voltage or a power supply problem to the control module.
2. What are the common symptoms of the C0800 code in a 2018 GMC Sierra?
Symptoms may include illuminated warning lights, erratic electrical system behavior, or intermittent system failures.
3. What causes the C0800 code on a 2018 GMC Sierra?
Common causes include a weak or failing battery, loose or corroded electrical connections, damaged wiring, or a faulty power control module.
4. How can I diagnose the C0800 code on my 2018 GMC Sierra?
Start by checking the battery voltage, inspecting fuses and wiring for damage or corrosion, and ensuring all connections are secure.
5. Can a weak battery trigger the C0800 code on a 2018 GMC Sierra?
Yes, a weak or failing battery can result in insufficient power to the control module, triggering the C0800 code.
6. Is it safe to drive my 2018 GMC Sierra with the C0800 code?
Driving with this code may lead to electrical system malfunctions, so it’s best to diagnose and repair the issue promptly.
7. How do I fix the C0800 code on a 2018 GMC Sierra?
Repairs may include replacing the battery, repairing damaged wiring, cleaning corroded connections, or replacing a faulty control module.
8. Can a blown fuse cause the C0800 code on a 2018 GMC Sierra?
Yes, a blown fuse can disrupt the power supply to the control module and trigger the C0800 code.
9. Do I need to clear the C0800 code after repairs on my 2018 GMC Sierra?
Yes, after completing repairs, use an OBDII scanner to clear the code and verify that it doesn’t return.
10. How much does it cost to fix the C0800 code on a 2018 GMC Sierra?
Repair costs vary depending on the cause, ranging from $50 for minor fixes like cleaning connections to $500 or more for control module replacement.
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