AutoCodes – GMC – P216B 2018 GMC Sierra

P216B 2018 GMC Sierra Code - Cylinder 5 Injector High Control Circuit Low 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: P216B 2018 GMC Sierra indicates Cylinder 5 Injector High Control Circuit Low 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 176

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 P216B 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 ground for greater than 2 s.

OBDII Code P216B 2018 GMC Sierra - Cylinder 5 Injector High Control Circuit Low Voltage - AutoCodes.com — P216B 2018 GMC Sierra Code - Cylinder 5 Injector High Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P216B 2018 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 P216B 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 P216B 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 P216B 2018 GMC Sierra code?

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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 P216B 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P216B in a 2018 GMC Sierra?

- Common symptoms include rough idling, misfires, loss of power, and potentially increased fuel consumption.

2. What causes the OBDII code P216B "Cylinder 5 Injector High Control Circuit Low Voltage" in a 2018 GMC Sierra?

- The code is typically triggered by issues such as a faulty fuel injector, wiring problems, or a malfunctioning Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P216B in my 2018 GMC Sierra?

- Diagnostic steps may involve checking the wiring harness for damage, testing the injector's resistance, and inspecting the ECM for any faults.

4. Can I continue driving my 2018 GMC Sierra with OBDII code P216B present?

- It is not recommended to drive the vehicle with this code active as it can lead to further damage and potential safety issues.

5. How do I repair the Cylinder 5 Injector High Control Circuit Low Voltage issue in a 2018 GMC Sierra?

- Repair may involve replacing the faulty fuel injector, repairing damaged wiring, or reprogramming the ECM if necessary.

6. Is it possible to reset the OBDII code P216B in a 2018 GMC Sierra without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it will likely reappear until the root cause is properly addressed.

7. Are there any maintenance tips to prevent OBDII code P216B from occurring in a 2018 GMC Sierra?

- Regularly servicing the fuel injectors, ensuring proper wiring connections, and keeping the ECM software updated can help prevent this issue.

8. How much does it cost to repair OBDII code P216B in a 2018 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix the Cylinder 5 Injector High Control Circuit Low Voltage problem in a 2018 GMC Sierra?

- While some experienced DIYers may be able to address this issue, it is recommended to consult a professional mechanic for proper diagnosis and repair.

10. How long does it take to fix OBDII code P216B in a 2018 GMC Sierra?

- The repair time can vary based on the specific cause of the issue and the complexity of the repair, but it may take a few hours to a full day to complete the necessary repairs.