AutoCodes – GMC – P217C 2018 GMC Sierra

P217C 2018 GMC Sierra Code - Cylinder 7 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 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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
P217C 2018 GMC Sierra indicates Cylinder 7 Injector High Control Circuit High Voltage.
Common causes
Common causes include Faulty Fuel Injector 7, Fuel Injector 7 harness is open or shorted, Fuel Injector 7 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 148
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 08, 2022
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Code P217C 2018 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 P217C 2018 GMC Sierra - Cylinder 7 Injector High Control Circuit High Voltage - AutoCodes.com
P217C 2018 GMC Sierra Code - Cylinder 7 Injector High Control Circuit High Voltage

What are the Possible Causes of the DTC P217C 2018 GMC Sierra?

  • Faulty Fuel Injector 7
  • Fuel Injector 7 harness is open or shorted
  • Fuel Injector 7 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P217C 2018 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 P217C 2018 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 P217C 2018 GMC Sierra code?

Need more information on how to fix the P217C 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P217C 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P217C on a 2018 GMC Sierra related to the Cylinder 7 Injector High Control Circuit High Voltage issue?

- Common symptoms may include rough idling, engine misfires, decreased fuel efficiency, and potentially a noticeable decrease in overall engine performance.

2. What are the possible causes of the Cylinder 7 Injector High Control Circuit High Voltage fault code (P217C) on a 2018 GMC Sierra?

- The code could be triggered by issues such as a faulty injector in cylinder 7, damaged wiring or connectors related to the injector circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the Cylinder 7 Injector High Control Circuit High Voltage fault code on my 2018 GMC Sierra?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the injector and its wiring harness for any visible damage, and testing the circuit for continuity and proper voltage levels.

4. Is it safe to drive my 2018 GMC Sierra with the P217C code indicating a Cylinder 7 Injector High Control Circuit High Voltage issue?

- It is not recommended to drive the vehicle extensively with this code present, as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

5. Can I reset the OBDII code P217C on my 2018 GMC Sierra related to the Cylinder 7 Injector High Control Circuit High Voltage problem?

- While you can clear the code with an OBDII scanner, it's important to address the underlying issue causing the fault code to prevent it from reoccurring.

6. How can I repair the Cylinder 7 Injector High Control Circuit High Voltage issue on my 2018 GMC Sierra?

- Repair options may include replacing the faulty injector in cylinder 7, repairing or replacing damaged wiring or connectors, or reprogramming the ECM if necessary.

7. Are there any specific maintenance tips to prevent the OBDII code P217C (Cylinder 7 Injector High Control Circuit High Voltage) on a 2018 GMC Sierra?

- Regularly servicing your vehicle, using high-quality fuel, and addressing any engine performance issues promptly can help prevent injector and circuit-related problems.

8. Will the OBDII code P217C on a 2018 GMC Sierra clear on its own over time?

- The code may clear on its own if the underlying issue causing it resolves itself, but it's best to diagnose and address the problem to prevent potential engine damage.

9. Can a DIY enthusiast without much experience work on fixing the Cylinder 7 Injector High Control Circuit High Voltage issue on a 2018 GMC Sierra?

- While some aspects of the repair may be DIY-friendly, working on the injector or electrical components of the engine should be approached with caution and may require professional assistance.

10. How much can I expect to spend on repairing the Cylinder 7 Injector High Control Circuit High Voltage issue indicated by OBDII code P217C on a 2018 GMC Sierra?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and potentially diagnostic fees from a mechanic or dealership.

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