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Engine-Codes – GMC – C0870 2016 GMC Sierra

C0870 2016 GMC Sierra Code - Control Module Voltage Reference

Quick Answer

The C0870 diagnostic trouble code (DTC) for a 2016 GMC Sierra pertains to the Control Module Voltage Reference. Common causes include Damaged wiring or connectors in the control module's voltage reference circuit, Faulty control module, Issues with the power supply to the control module. 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 2016 GMC Sierra indicates Control Module Voltage Reference.
Common causes
Common causes include Damaged wiring or connectors in the control module's voltage reference circuit, Faulty control module, Issues with the power supply to the control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code C0870 2016 GMC Sierra Description

The C0870 diagnostic trouble code (DTC) for a 2016 GMC Sierra pertains to the Control Module Voltage Reference. This code indicates that there is a malfunction in the control module's voltage reference circuit, which can lead to various issues in the vehicle's systems. The control module, also known as the electronic control unit (ECU) or engine control module (ECM), plays a crucial role in monitoring and controlling various functions in the vehicle.

OBDII Code C0870 2016 GMC Sierra - Control Module Voltage Reference
C0870 2016 GMC Sierra Code - Control Module Voltage Reference

Common Causes of C0870 2016 GMC Sierra

  1. Damaged wiring or connectors in the control module's voltage reference circuit
  2. Faulty control module
  3. Issues with the power supply to the control module
  4. Corrosion or contamination in the connections
  5. Electrical system issues such as low battery voltage

Symptoms of C0870 2016 GMC Sierra

  1. Rough idling or engine misfires
  2. Stalling or difficulty starting the engine
  3. Poor acceleration and overall performance
  4. Illumination of the check engine light
  5. Decreased fuel efficiency

How to Fix C0870 2016 GMC Sierra

  1. Perform a thorough diagnostic check using a scan tool to pinpoint the exact cause of the C0870 code.
  2. Inspect the wiring and connectors in the control module's voltage reference circuit for any damage or corrosion.
  3. Test the control module and power supply to ensure they are functioning correctly.
  4. Replace or repair any damaged components as needed.
  5. Clear the DTC and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix C0870 2016 GMC Sierra

The cost of repairing a C0870 code can vary depending on the extent of the damage and the specific parts that need to be replaced. On average, the parts for this repair may cost between $100 to $300, while labor costs can range from $100 to $300. Overall, the total repair cost for addressing the Control Module Voltage Reference issue may fall within the range of $200 to $600. It's important to note that labor rates and parts prices can fluctuate, so it's advisable to obtain quotes from local auto repair shops for a more accurate estimate.

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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 C0870 2016 GMC Sierra Code

1. What does OBDII code C0870 for a 2016 GMC Sierra indicate?

The code C0870 in a 2016 GMC Sierra relates to a Control Module Voltage Reference issue.

2. What are the common symptoms of OBDII code C0870 in a 2016 GMC Sierra?

Common symptoms of code C0870 in a 2016 GMC Sierra may include erratic behavior of electronic components, such as malfunctioning sensors or systems.

3. What are the possible causes of OBDII code C0870 in a 2016 GMC Sierra?

Potential causes of code C0870 in a 2016 GMC Sierra include a faulty control module, wiring issues, or a problem with the voltage reference circuit.

4. How can I diagnose OBDII code C0870 in a 2016 GMC Sierra?

Diagnosing code C0870 in a 2016 GMC Sierra involves using a diagnostic scanner to retrieve the trouble code and then inspecting the control module, wiring, and voltage reference circuit for any faults.

5. How can I repair OBDII code C0870 in a 2016 GMC Sierra?

Repairing code C0870 in a 2016 GMC Sierra may involve replacing a faulty control module, repairing damaged wiring, or addressing issues with the voltage reference circuit as needed.

6. Are there any DIY tips for addressing OBDII code C0870 in a 2016 GMC Sierra?

While some basic troubleshooting like checking for loose connections or damaged wires can be done as a DIY step, diagnosing and repairing code C0870 often requires advanced automotive knowledge and tools.

7. Can driving with OBDII code C0870 in a 2016 GMC Sierra cause further damage?

Continuing to drive with code C0870 in a 2016 GMC Sierra may lead to further malfunctions in electronic components relying on the control module affected by the voltage reference issue.

8. Is it safe to clear the OBDII code C0870 in a 2016 GMC Sierra with a diagnostic tool?

Clearing the code C0870 in a 2016 GMC Sierra using a diagnostic tool may temporarily turn off the check engine light, but it won't address the underlying issue causing the code to trigger.

9. How much does it typically cost to repair OBDII code C0870 in a 2016 GMC Sierra?

The cost of repairing code C0870 in a 2016 GMC Sierra varies depending on the specific cause of the issue, the parts needed for repair, and labor costs at the repair facility.

10. Can a mechanic help me with diagnosing and repairing OBDII code C0870 in a 2016 GMC Sierra?

Yes, a qualified mechanic with experience in diagnosing and repairing automotive electrical issues can assist you in resolving OBDII code C0870 in a 2016 GMC Sierra.

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