AutoCodes – GMC – P216D GMC

P216D GMC Code - Cylinder 6 Injector High Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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: P216D GMC indicates Cylinder 6 Injector High Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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 2,061

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P216D 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 not to factory specifications.

OBDII Code P216D GMC - Cylinder 6 Injector High Control Circuit - AutoCodes.com — P216D GMC Code - Cylinder 6 Injector High Control Circuit

What does this mean?

What are the Possible Causes of the DTC P216D GMC?

Faulty Fuel Injector 6
Fuel Injector 6 harness is open or shorted
Fuel Injector 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P216D 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 P216D 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 P216D GMC 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 P216D GMC Code

1. What are the common symptoms of OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

The common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potentially a noticeable misfire in the engine.

2. What are the possible causes of OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

Possible causes include a faulty fuel injector, wiring issues in the injector control circuit, a damaged injector driver in the engine control module (ECM), or a poor connection in the injector circuit.

3. How can I diagnose the OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

Diagnosis involves using a scan tool to read the code, checking the wiring and connections related to the cylinder 6 injector, and performing tests to determine the cause of the high control circuit issue.

4. Can a DIY enthusiast repair OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

While some DIY enthusiasts may be able to address this issue by checking and repairing wiring or connections, it is recommended to consult a professional mechanic for proper diagnosis and repair to avoid further damage.

5. Is it safe to continue driving with OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

It is not recommended to continue driving with this code active, as it can lead to further engine damage and potentially dangerous driving conditions. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

The cost of repair can vary depending on the underlying cause of the issue, but it may involve replacing a faulty fuel injector, repairing wiring, or addressing ECM issues. Costs can range from a few hundred to over a thousand dollars.

7. Can a bad fuel injector cause OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

Yes, a faulty fuel injector in cylinder 6 can cause the high control circuit issue indicated by the P216D code. It is one of the common culprits for this specific OBDII trouble code.

8. How long does it typically take to repair OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

The repair time can vary depending on the exact cause of the issue and the extent of repairs needed. In most cases, a professional mechanic can address this problem within a few hours to a day.

9. Are there any preventative measures to avoid OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit)?

Regular maintenance, including fuel system cleaning and using quality fuel, can help prevent issues with fuel injectors and injector control circuits that may trigger this OBDII code.

10. Can a software update fix OBDII code P216D GMC (Cylinder 6 Injector High Control Circuit?

In some cases, updating the ECM software may resolve the high control circuit issue triggering the P216D code. It is advisable to consult a qualified mechanic or dealership to determine if a software update is a viable solution.