AutoCodes – GMC – C0870 Gmc

C0870 Gmc Code - Control Module Voltage Reference

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: C0870 Gmc indicates Control Module Voltage Reference.
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 4,004

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
Cost to Diagnose
FAQs
Comments
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Code C0870 Gmc 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 C0870 Gmc - Control Module Voltage Reference - AutoCodes.com — C0870 Gmc Code - Control Module Voltage Reference

What does this mean?

What are the Possible Causes of the DTC C0870 Gmc?

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

How to Fix the DTC C0870 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0870 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 C0870 Gmc code?

Need more information on how to fix the C0870 Gmc code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0870 Gmc code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

C0870 2014 GMC Sierra — Control Module Voltage Reference
C0870 2015 GMC Sierra — Control Module Voltage Reference
C0870 2016 GMC Sierra — Control Module Voltage Reference
C0870 2017 GMC Sierra — Control Module Voltage Reference
C0870 2018 GMC Sierra — Control Module Voltage Reference

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 C0870 Gmc Code

1. What are the common symptoms of OBDII code C0870 in a GMC vehicle?

- Common symptoms include illuminated Check Engine Light, rough idling, engine stalling, and poor vehicle performance.

2. What does OBDII code C0870 in a GMC indicate about the control module voltage reference?

- This code indicates that there is a problem with the voltage reference for a control module in the vehicle.

3. What are the possible causes of OBDII code C0870 in a GMC?

- Possible causes include a faulty control module, wiring issues, poor electrical connections, or a malfunctioning voltage regulator.

4. How can I diagnose the OBDII code C0870 in my GMC to pinpoint the issue?

- A thorough inspection of the control module, wiring, and voltage regulator, along with using a diagnostic scanner, can help pinpoint the issue.

5. Can OBDII code C0870 in a GMC be repaired by a DIY enthusiast?

- While some may tackle the repair, it is recommended to seek professional help due to the complexity of diagnosing and repairing electrical issues.

6. What are the repair options for addressing OBDII code C0870 in a GMC?

- Repairs may involve replacing the faulty control module, repairing damaged wiring, ensuring proper electrical connections, or addressing issues with the voltage regulator.

7. Are there any preventive measures to avoid encountering OBDII code C0870 in a GMC?

- Regular maintenance checks, ensuring proper electrical system functioning, and addressing any warning signs promptly can help prevent this code from appearing.

8. Can driving with OBDII code C0870 in a GMC cause further damage to the vehicle?

- Continuing to drive with this code present may lead to more severe electrical issues, poor vehicle performance, and potential damage to other components.

9. How long does it typically take to repair OBDII code C0870 in a GMC?

- The repair duration can vary based on the specific cause of the issue, ranging from a few hours to a day, depending on the complexity of the repair needed.

10. Is it necessary to reset the OBDII system after repairing code C0870 in a GMC?

- Yes, it is important to clear the code and reset the OBDII system after completing the repair to ensure the issue has been resolved and the Check Engine Light is turned off.