Engine-Codes.com
Engine-Codes – GMC – P216C 2016 GMC Sierra

P216C 2016 GMC Sierra Code - Cylinder 5 Injector High Control Circuit High Voltage

Quick Answer

The P216C diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a high voltage condition in the control circuit of the fuel injector for cylinder 5. Common causes include Short circuit in the wiring harness leading to the cylinder 5 injector, Faulty fuel injector that may be stuck open or closed, Malfunctioning Engine Control Module (ECM) that incorrectly interprets voltage levels. 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 2016 GMC Sierra indicates Cylinder 5 Injector High Control Circuit High Voltage.
Common causes
Common causes include Short circuit in the wiring harness leading to the cylinder 5 injector, Faulty fuel injector that may be stuck open or closed, Malfunctioning Engine Control Module (ECM) that incorrectly interprets voltage levels.
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 Oct 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P216C 2016 GMC Sierra Description

The P216C diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a high voltage condition in the control circuit of the fuel injector for cylinder 5. This code is specific to the fuel injection system, which is crucial for the proper operation of the engine. When the ECM identifies that the voltage in the injector control circuit exceeds the expected range, it triggers this code.

OBDII Code P216C 2016 GMC Sierra - Cylinder 5 Injector High Control Circuit High Voltage
P216C 2016 GMC Sierra Code - Cylinder 5 Injector High Control Circuit High Voltage

Common Causes of P216C 2016 GMC Sierra

  1. Short circuit in the wiring harness leading to the cylinder 5 injector.
  2. Faulty fuel injector that may be stuck open or closed.
  3. Malfunctioning Engine Control Module (ECM) that incorrectly interprets voltage levels.
  4. Damaged or corroded connectors in the injector circuit.
  5. Issues with the vehicle's electrical system, such as a failing battery or alternator.

Symptoms of P216C 2016 GMC Sierra

  1. Engine misfires, particularly noticeable during acceleration or under load.
  2. Rough idling or unstable engine performance.
  3. Decreased fuel efficiency due to improper fuel delivery.
  4. Increased exhaust emissions, potentially triggering the check engine light.
  5. Difficulty starting the engine or stalling during operation.

How to Fix P216C 2016 GMC Sierra

  1. Visual Inspection: Begin with a thorough visual inspection of the wiring harness and connectors associated with the cylinder 5 injector. Look for signs of wear, corrosion, or damage.
  2. Electrical Testing: Use a multimeter to check the voltage and resistance in the injector circuit. This will help identify if there is a short circuit or if the injector itself is faulty.
  3. Injector Replacement: If the injector is found to be defective, replace it with a new or refurbished unit. Ensure that the new injector is compatible with the vehicle's specifications.
  4. Repair Wiring Issues: If damaged wiring or connectors are found, repair or replace them as necessary to ensure a proper electrical connection.
  5. ECM Reprogramming: If the ECM is suspected to be faulty, it may need to be reprogrammed or replaced. After repairs, clear the DTC and perform a test drive to ensure the issue is resolved.

Cost to Fix P216C 2016 GMC Sierra

** The typical repair costs for addressing a P216C code can range from $200 to $800, depending on the specific repairs needed. This estimate includes parts such as a new fuel injector, wiring harnesses, and labor. Labor rates can vary significantly; most auto repair shops charge between $80 and $150 per hour. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer lower rates. It is advisable to check local rates for a more precise estimate, as well as to obtain quotes from multiple repair facilities to ensure competitive pricing.

Need more information about the P216C 2016 GMC Sierra code?

Need more information on how to fix the P216C 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P216C 2016 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 2016 GMC Sierra Code

1. What does the OBDII code P216C mean on a 2016 GMC Sierra?

The P216C code indicates a problem with the Cylinder 5 Injector High Control Circuit, specifically that the circuit is experiencing higher-than-expected voltage.

2. What are the common symptoms of a P216C code in a 2016 GMC Sierra?

Symptoms may include rough engine idle, reduced power, misfiring, poor fuel economy, or an illuminated check engine light.

3. What causes the P216C code to appear on a 2016 GMC Sierra?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning powertrain control module (PCM), or a poor electrical ground connection.

4. Can I drive my 2016 GMC Sierra with the P216C code?

Driving with this code is not recommended as it can lead to reduced performance, engine damage, or further electrical issues.

5. How do I diagnose the P216C code on a 2016 GMC Sierra?

Diagnose the issue by inspecting the wiring and connectors for Cylinder 5's injector, testing the injector for proper resistance, and using a multimeter to check for voltage irregularities in the circuit.

6. How do I fix the P216C code on my 2016 GMC Sierra?

Repairs may involve replacing the faulty injector, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to fix the P216C code on a 2016 GMC Sierra?

Repair costs vary but may range from $200 to $600 or more, depending on whether the injector, wiring, or PCM needs replacement.

8. Can a dirty fuel injector cause the P216C code?

While a dirty injector can cause performance issues, this code specifically relates to an electrical problem in the injector circuit, not clogging.

9. Will clearing the P216C code with a scanner fix the issue?

Clearing the code will turn off the check engine light temporarily, but the issue will return if the underlying problem is not resolved.

10. Can a faulty PCM cause the P216C code on a 2016 GMC Sierra?

Yes, a malfunctioning PCM could send incorrect voltage signals to the injector, triggering the P216C code.

Discuss the causes and fixes for P216C 2016 GMC Sierra OBDII Code

Submit a New Comment

Code P216C 2016 GMC Sierra comments

No comments found for this page.