AutoCodes – GMC – C0899 2018 GMC Sierra

C0899 2018 GMC Sierra Code - Device Voltage Malfunction

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: C0899 2018 GMC Sierra indicates Device Voltage Malfunction.
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 242

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 Jul 13, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0899 2018 GMC Sierra 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 C0899 2018 GMC Sierra - Device Voltage Malfunction - AutoCodes.com — C0899 2018 GMC Sierra Code - Device Voltage Malfunction

What does this mean?

What are the Possible Causes of the DTC C0899 2018 GMC Sierra?

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

How to Fix the DTC C0899 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.

What does this mean?

Code Tech Notes

- C0899 00: Control Module Power Circuit Malfunction
- C0899 03: Control Module Power Circuit Low Voltage

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0899 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 C0899 2018 GMC Sierra 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 C0899 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code C0899 Device Voltage Malfunction in a 2018 GMC Sierra?

- Common symptoms include dashboard warning lights illuminating, loss of communication with vehicle systems, and potential issues with electronic components.

2. What are the possible causes of OBDII code C0899 Device Voltage Malfunction in a 2018 GMC Sierra?

- Possible causes may include a malfunctioning voltage regulator, wiring issues, a faulty control module, or a weak battery.

3. How can I diagnose the cause of OBDII code C0899 Device Voltage Malfunction in my 2018 GMC Sierra?

- To diagnose this issue, you may need to perform a thorough inspection of the vehicle's electrical system, check the battery voltage, test the voltage regulator, and scan the vehicle for other related codes.

4. Can I drive my 2018 GMC Sierra with OBDII code C0899 Device Voltage Malfunction?

- It is not recommended to drive the vehicle with this code present, as it may lead to further electrical issues and potential system failures.

5. How can I reset OBDII code C0899 Device Voltage Malfunction in my 2018 GMC Sierra?

- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is crucial to address the underlying issue causing the malfunction code.

6. Is it safe to ignore OBDII code C0899 Device Voltage Malfunction in my 2018 GMC Sierra?

- Ignoring this code can lead to electrical problems, potential system failures, and unsafe driving conditions. It is best to address the issue promptly.

7. What are some repair tips for fixing OBDII code C0899 Device Voltage Malfunction in a 2018 GMC Sierra?

- Repair tips may include checking and repairing any damaged wiring, testing and replacing the voltage regulator if necessary, ensuring a strong battery connection, and clearing the code after repairs.

8. Can a DIY enthusiast fix OBDII code C0899 Device Voltage Malfunction in a 2018 GMC Sierra?

- While some basic diagnostics and repairs can be performed by a DIY enthusiast, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair of this electrical issue.

9. How much does it typically cost to repair OBDII code C0899 Device Voltage Malfunction in a 2018 GMC Sierra?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts replacement, labor costs, and diagnostic fees.

10. How can I prevent OBDII code C0899 Device Voltage Malfunction from occurring in my 2018 GMC Sierra in the future?

- To prevent this code from reoccurring, it is essential to maintain the vehicle's electrical system, regularly check the battery's condition, ensure proper wiring connections, and address any warning signs promptly.