AutoCodes – GMC – P216A GMC

P216A GMC Code - Cylinder 5 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 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: P216A GMC indicates Cylinder 5 Injector High Control Circuit.
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 1,681

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 P216A 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 P216A GMC - Cylinder 5 Injector High Control Circuit - AutoCodes.com — P216A GMC Code - Cylinder 5 Injector High Control Circuit

What does this mean?

What are the Possible Causes of the DTC P216A GMC?

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 P216A 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 P216A 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.

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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 P216A GMC Code

What does the OBDII code P216A mean for my GMC vehicle?

The OBDII code P216A indicates a problem with the control circuit for the fuel injector of cylinder 5, suggesting that the injector is receiving higher voltage than expected.

What are the common symptoms associated with the P216A code?

Common symptoms include rough idling, misfires, reduced engine performance, increased fuel consumption, and illumination of the check engine light.

What could cause the P216A code to trigger?

Possible causes include a faulty fuel injector for cylinder 5, damaged wiring or connectors in the injector circuit, a malfunctioning engine control module (ECM), or issues with the fuel supply.

How can I diagnose the P216A code effectively?

To diagnose this code, start by visually inspecting the wiring and connectors for damage, then test the fuel injector for proper operation and resistance. A scan tool can help monitor the injector's response while the engine is running.

Is it safe to drive my vehicle with the P216A code?

While it may be safe to drive short distances, persistent issues like misfires can lead to further engine damage and should be addressed as soon as possible to avoid potential complications.

What are some common repairs for the P216A code?

Common repairs include replacing the faulty fuel injector, repairing or replacing damaged wiring or connectors, and reprogramming or replacing the ECM if it is found to be defective.

How can I prevent the P216A code from reoccurring?

To prevent the P216A code from coming back, ensure regular maintenance of your fuel system, keep an eye on the electrical connections, and promptly address any engine performance issues.

Will clearing the P216A code fix the problem?

Clearing the code may turn off the check engine light temporarily, but it will not fix the underlying issue. Proper diagnosis and repairs are necessary to resolve the problem effectively.

What should I do if I am not comfortable diagnosing or fixing the P216A code myself?

If you're not comfortable with diagnosing or repairing the issue, it's best to take your vehicle to a qualified mechanic who can accurately identify and resolve the problem.