AutoCodes – GMC – P216C 2017 GMC Sierra

P216C 2017 GMC Sierra Code - Cylinder 5 Injector High Control Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 circuit poor electrical connection. 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: P216C 2017 GMC Sierra indicates Cylinder 5 Injector High Control Circuit High Voltage.
Common causes: Common causes include Faulty Fuel Injector 5, Fuel Injector 5 harness is open or shorted, Fuel Injector 5 circuit poor electrical connection.
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 140

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 Sep 08, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P216C 2017 GMC Sierra Description

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. The ECM energizes each fuel injector by grounding the low control circuit of the fuel injector. The ECM monitors the status of the fuel injector circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the fuel injector high voltage supply circuit is shorted to voltage for greater than 2 s.

OBDII Code P216C 2017 GMC Sierra - Cylinder 5 Injector High Control Circuit High Voltage - AutoCodes.com — P216C 2017 GMC Sierra Code - Cylinder 5 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P216C 2017 GMC Sierra?

Faulty Fuel Injector 5
Fuel Injector 5 harness is open or shorted
Fuel Injector 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P216C 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 P216C 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 P216C 2017 GMC Sierra code?

Need more information on how to fix the P216C 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P216C 2017 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 P216C 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P216C in a 2017 GMC Sierra?

The common symptoms of code P216C include rough idling, misfires, decreased fuel efficiency, and in some cases, the Check Engine light may illuminate.

2. What could cause the Cylinder 5 Injector High Control Circuit High Voltage code in a 2017 GMC Sierra?

The P216C code in a 2017 GMC Sierra is typically caused by issues such as a faulty fuel injector, wiring harness problems, a bad ECM (Engine Control Module), or poor electrical connections.

3. How can I diagnose the Cylinder 5 Injector High Control Circuit High Voltage issue in my 2017 GMC Sierra?

To diagnose the P216C code, you can use an OBDII scanner to retrieve the trouble codes, perform a visual inspection of the injector and wiring, test the injector for proper functioning, and check the ECM for any faults.

4. Can I continue driving my 2017 GMC Sierra with OBDII code P216C?

It is not recommended to drive your Sierra with the P216C code present, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

5. How do I repair the Cylinder 5 Injector High Control Circuit High Voltage problem in my 2017 GMC Sierra?

Repairing the P216C code may involve replacing the faulty fuel injector, repairing or replacing damaged wiring, addressing ECM issues, and ensuring all electrical connections are secure and functioning properly.

6. Are there any DIY tips for fixing the P216C code in a 2017 GMC Sierra?

While diagnosing and repairing the P216C code can be complex, DIY enthusiasts with automotive knowledge can attempt tasks like checking and cleaning electrical connections, inspecting for visible wiring damage, and testing the fuel injector with proper tools.

7. What are the potential risks of ignoring the OBDII code P216C in my 2017 GMC Sierra?

Ignoring the P216C code can lead to poor engine performance, decreased fuel efficiency, potential engine misfires, and in extreme cases, severe engine damage that may result in costly repairs.

8. How much does it typically cost to fix the Cylinder 5 Injector High Control Circuit High Voltage issue in a 2017 GMC Sierra?

The cost of fixing the P216C code can vary depending on the root cause of the problem, but it may range from a few hundred dollars for basic repairs to over a thousand dollars for more extensive issues requiring professional intervention.

9. Can a mechanic easily reset the OBDII code P216C in a 2017 GMC Sierra after repairs?

Once the underlying issue causing the P216C code has been fixed, a mechanic can reset the code using an OBDII scanner to clear the error code and turn off the Check Engine light in your 2017 GMC Sierra.

10. Is it recommended to seek professional help for diagnosing and repairing the P216C code in a 2017 GMC Sierra?

Given the complexity of diagnosing and repairing the P216C code, especially if it involves intricate electrical components, seeking professional help from a certified mechanic or dealership is highly recommended to ensure thorough and accurate resolution of the issue.