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Engine-Codes – GMC – P216C 2017 GMC Sierra

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

Quick Answer

The diagnostic trouble code P216C for a 2017 GMC Sierra indicates an issue with the high control circuit voltage of the fuel injector in cylinder 5. Common causes include Wiring harness damage or short circuit, Faulty fuel injector, Malfunctioning ECM. 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 Wiring harness damage or short circuit, Faulty fuel injector, Malfunctioning ECM.
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 17, 2024
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Code P216C 2017 GMC Sierra Description

The diagnostic trouble code P216C for a 2017 GMC Sierra indicates an issue with the high control circuit voltage of the fuel injector in cylinder 5. This code is typically triggered when the Engine Control Module (ECM) detects a voltage that is higher than the specified range for the injector circuit. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber for proper engine operation. When the voltage in the circuit is too high, it can lead to improper fuel delivery, affecting the engine's performance and efficiency.

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

Common Causes of P216C 2017 GMC Sierra

  1. Wiring harness damage or short circuit
  2. Faulty fuel injector
  3. Malfunctioning ECM
  4. Fuel injector driver circuit issue
  5. Poor electrical connection

Symptoms of P216C 2017 GMC Sierra

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P216C 2017 GMC Sierra

  1. Perform a visual inspection of the wiring harness connected to the fuel injector in cylinder 5 to check for any damage or loose connections.
  2. Use a multimeter to test the voltage in the injector circuit and compare it to the manufacturer's specifications.
  3. Test the fuel injector itself to determine if it is functioning correctly.
  4. Check the ECM for any fault codes or issues that may be affecting the injector circuit.
  5. Replace any damaged wiring, faulty fuel injector, or malfunctioning ECM as needed to resolve the high voltage issue.

Cost to Fix P216C 2017 GMC Sierra

The typical repair costs for addressing a P216C code on a 2017 GMC Sierra can range from $200 to $600, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, factors such as location, vehicle make and model, and engine type can also impact the overall repair costs.

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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 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.

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