C0870 2017 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 2017 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.
Code C0870 2017 GMC Sierra Description
What are the Possible Causes of the DTC C0870 2017 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 2017 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 2017 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 2017 GMC Sierra code?
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Frequently Asked Questions about C0870 2017 GMC Sierra Code
1. What does the OBDII code C0870 mean on a 2017 GMC Sierra?
The code C0870 indicates an issue with the control module voltage reference circuit, which monitors and ensures proper voltage levels for various vehicle systems.
2. What are the common symptoms of code C0870 in a 2017 GMC Sierra?
Symptoms may include warning lights on the dashboard, erratic behavior of vehicle systems like traction control or ABS, and occasional loss of functionality in certain electronic components.
3. What causes the C0870 code to appear on a GMC Sierra?
Common causes include a faulty control module, wiring issues like loose or corroded connections, or an inconsistent voltage supply from the battery or alternator.
4. How can I diagnose the C0870 code in my 2017 GMC Sierra?
Start by checking the battery voltage and alternator output. Inspect the wiring and connectors in the voltage reference circuit for damage or corrosion. Use a scan tool to monitor voltage readings from the control module.
5. Can a weak battery trigger the C0870 code in a GMC Sierra?
Yes, a weak or failing battery can cause voltage irregularities, potentially triggering the C0870 code.
6. Is it safe to drive a 2017 GMC Sierra with the C0870 code?
It may be safe to drive short distances, but since the issue affects electrical systems, it’s best to address it promptly to avoid further complications.
7. How do I fix the C0870 code on my 2017 GMC Sierra?
Repairs may include cleaning or repairing wiring and connectors, replacing a faulty control module, or ensuring the battery and alternator are functioning properly.
8. Can the C0870 code be cleared without repairs?
Clearing the code with a scan tool may temporarily turn off the warning light, but the issue will likely return unless the underlying problem is resolved.
9. How much does it cost to fix the C0870 code on a 2017 GMC Sierra?
Repair costs vary depending on the cause, ranging from a simple wiring fix (around $50–$150) to control module replacement (several hundred dollars).
10. Can a faulty alternator cause the C0870 code in a GMC Sierra?
Yes, a faulty alternator that provides inconsistent voltage can lead to the C0870 code being triggered.
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