AutoCodes – GMC – C0870 2015 GMC Sierra

C0870 2015 GMC Sierra 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 2015 GMC Sierra 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 320

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 2015 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 C0870 2015 GMC Sierra - Control Module Voltage Reference - AutoCodes.com — C0870 2015 GMC Sierra Code - Control Module Voltage Reference

What does this mean?

What are the Possible Causes of the DTC C0870 2015 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 C0870 2015 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0870 2015 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 C0870 2015 GMC Sierra code?

Need more information on how to fix the C0870 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0870 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2015 GMC Sierra Code

1. What does OBDII code C0870 for a 2015 GMC Sierra indicate?

The code C0870 on a 2015 GMC Sierra refers to a problem with the Control Module Voltage Reference circuit.

2. What are the common symptoms of OBDII code C0870 on a GMC Sierra?

Common symptoms of code C0870 may include issues with the vehicle's electrical system, such as erratic behavior of electronic components or warning lights on the dashboard.

3. What are the possible causes of OBDII code C0870 in a 2015 GMC Sierra?

Possible causes of code C0870 can include a faulty control module, damaged wiring or connectors in the voltage reference circuit, or a malfunctioning sensor.

4. How can I diagnose the OBDII code C0870 on my 2015 GMC Sierra?

Diagnosing code C0870 typically involves using a diagnostic scanner to read the code and then performing a thorough inspection of the control module, wiring, and connectors associated with the voltage reference circuit.

5. Can I continue driving my GMC Sierra with OBDII code C0870 present?

It is not recommended to drive your GMC Sierra with an unresolved OBDII code like C0870, as it can lead to further electrical issues and potential safety hazards.

6. How can I repair OBDII code C0870 on a 2015 GMC Sierra?

Repairing code C0870 may involve replacing the faulty control module, repairing or replacing damaged wiring or connectors, or addressing any underlying issues causing the voltage reference circuit problem.

7. Is it necessary to reset the OBDII code C0870 after repairing the issue on my GMC Sierra?

Yes, it is important to clear the OBDII code C0870 after resolving the underlying problem to reset the vehicle's system and ensure that the issue has been successfully addressed.

8. Can a DIY enthusiast fix OBDII code C0870 on a GMC Sierra?

While some DIY enthusiasts may be able to diagnose and repair basic electrical issues, resolving OBDII code C0870 on a GMC Sierra may require advanced knowledge and tools, so it is recommended to seek professional help.

9. How much does it cost to repair OBDII code C0870 on a 2015 GMC Sierra at a dealership?

The cost of repairing code C0870 at a dealership can vary depending on the extent of the issue, parts needed for replacement, and labor costs, so it is advisable to request a quote from the service department.

10. Can OBDII code C0870 on a 2015 GMC Sierra be prevented in the future?

Regular maintenance and timely inspection of the vehicle's electrical system, including the control module and associated components, can help prevent issues like code C0870 from occurring in the future.