AutoCodes – Buick – P216C Buick

P216C Buick Code - Cylinder 5 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 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
P216C Buick indicates Cylinder 5 Injector High Control Circuit High 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 770
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 23, 2024
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Code P216C Buick 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 P216C Buick - Cylinder 5 Injector High Control Circuit High Voltage - AutoCodes.com
P216C Buick Code - Cylinder 5 Injector High Control Circuit High Voltage

What are the Possible Causes of the DTC P216C Buick?

  • 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 P216C Buick?

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 P216C Buick 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.

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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 P216C Buick Code

1. What are common symptoms of OBDII code P216C in a Buick related to the Cylinder 5 Injector High Control Circuit High Voltage?

The common symptoms include rough engine idling, decreased fuel efficiency, engine misfires, and potentially a noticeable decrease in overall engine performance.

2. What are the possible causes of OBDII code P216C in a Buick indicating a high voltage issue with the Cylinder 5 injector control circuit?

Possible causes include a faulty fuel injector in cylinder 5, a wiring issue in the injector control circuit, a problem with the engine control module (ECM), or a poor electrical connection.

3. How can I diagnose the OBDII code P216C in my Buick associated with the Cylinder 5 Injector High Control Circuit High Voltage?

Diagnosis typically involves using an OBDII scanner to read the code, performing a visual inspection of the injector and wiring, conducting electrical tests on the circuit, and potentially using a multimeter to check for voltage irregularities.

4. What are the potential risks of driving with the OBDII code P216C triggered in a Buick due to a high voltage problem with Cylinder 5 injector control?

Continued driving with this issue may lead to further engine damage, reduced fuel efficiency, increased emissions, and potential safety risks if the problem worsens and affects engine performance.

5. How can I repair the OBDII code P216C in my Buick indicating a high voltage issue with the Cylinder 5 injector control circuit?

Repair options may include replacing the faulty fuel injector in cylinder 5, repairing or replacing damaged wiring in the injector control circuit, addressing any ECM issues, and ensuring all electrical connections are secure.

6. Can a DIY enthusiast fix the OBDII code P216C related to the Cylinder 5 Injector High Control Circuit High Voltage in a Buick?

While some enthusiasts may have the skills to diagnose and repair this issue, it is recommended to consult a professional mechanic or technician, especially for complex electrical or engine-related problems.

7. Is it safe to continue driving my Buick with the OBDII code P216C illuminated due to a high voltage issue with Cylinder 5 injector control?

It is generally not recommended to drive the vehicle with this code illuminated, as it can lead to potential engine damage and reduced performance. Immediate inspection and repair are advised.

8. Will resetting the OBDII code P216C in my Buick resolve the high voltage problem with the Cylinder 5 injector control circuit?

Simply resetting the code may temporarily turn off the check engine light, but it will not address the underlying issue causing the high voltage problem. Proper diagnosis and repair are necessary.

9. How much can I expect to pay for repairing the OBDII code P216C in a Buick associated with a high voltage issue in the Cylinder 5 injector control circuit?

Costs can vary depending on the exact cause of the issue, but expect to pay for parts such as a new fuel injector, wiring repairs, and potential labor costs for diagnosis and repair, which could range from a few hundred to over a thousand dollars.

10. What steps can I take to prevent the recurrence of OBDII code P216C in my Buick related to the Cylinder 5 Injector High Control Circuit High Voltage?

Regular maintenance, including timely fuel injector inspections, checking the integrity of wiring harnesses, and addressing any engine performance issues promptly, can help prevent the recurrence of this code.

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