AutoCodes – GMC – P217C GMC

P217C GMC 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 GMC 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.

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Code Popularity 893

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P217C GMC 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 GMC - Cylinder 7 Injector High Control Circuit High Voltage - AutoCodes.com — P217C GMC Code - Cylinder 7 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P217C GMC?

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 GMC?

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 GMC 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 GMC code?

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

Need Help with the Code?

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Information for Specific GMC Models

P217C 2014 GMC Sierra — Cylinder 7 Injector High Control Circuit High Voltage
P217C 2015 GMC Sierra — Cylinder 7 Injector High Control Circuit High Voltage
P217C 2016 GMC Sierra — Cylinder 7 Injector High Control Circuit High Voltage
P217C 2017 GMC Sierra — Cylinder 7 Injector High Control Circuit High Voltage
P217C 2018 GMC Sierra — Cylinder 7 Injector High Control Circuit High Voltage

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 GMC Code

1. What does the OBDII code P217C mean on a GMC?

The P217C code indicates that the Cylinder 7 Injector High Control Circuit is experiencing a high voltage condition, which can affect fuel injection performance.

2. What are the common symptoms of code P217C in a GMC vehicle?

Symptoms may include rough idling, reduced engine power, misfires, poor fuel efficiency, and the Check Engine Light illuminating.

3. What causes the P217C code to appear?

Common causes include a faulty fuel injector for Cylinder 7, damaged or corroded wiring, a malfunctioning engine control module (ECM), or a bad injector driver circuit.

4. Can I still drive my GMC with the P217C code?

Driving with this code is not recommended, as it can lead to engine performance issues and potentially cause further damage to the engine or catalytic converter.

5. How do I diagnose the P217C code on my GMC?

Diagnosis involves inspecting the wiring and connectors for Cylinder 7's injector, testing the injector with a multimeter, and scanning the ECM for related codes.

6. What repairs can fix the P217C code?

Repairs may include replacing the Cylinder 7 fuel injector, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the ECM.

7. How much does it cost to fix the P217C code on a GMC vehicle?

The repair cost can vary, but replacing a fuel injector typically costs between $150 and $400, while ECM repairs or replacements may cost upwards of $800.

8. Can a dirty fuel injector cause the P217C code?

While rare, a dirty injector can sometimes cause electrical irregularities. However, the code more commonly points to electrical or circuit issues.

9. Is P217C specific to GMC vehicles?

No, P217C can appear in other vehicles, but its specific meaning and diagnosis may vary depending on the manufacturer.

10. How can I prevent the P217C code from recurring?

Regular maintenance, such as inspecting wiring, using high-quality fuel, and periodically cleaning the fuel injectors, can help prevent this code from recurring.