AutoCodes – GMC – P2312 2017 GMC Sierra

P2312 2017 GMC Sierra Code - Ignition Coil 5 Control Circuit Low Voltage

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 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: P2312 2017 GMC Sierra indicates Ignition Coil 5 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 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 205

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 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2312 2017 GMC Sierra Description

The ignition system on this engine uses ignition coils with integrated power transistors. The Engine Control Module (ECM) controls the spark event for each cylinder through individual ignition coil control circuits. When the ECM commands the ignition control circuit On, electrical current flows through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM commands the ignition control circuit Off, interrupting current flow through the primary winding. The collapsing magnetic field created by the primary winding induces a high voltage in the secondary winding, which is connected to the spark plugs. The Diagnostic Trouble Code (DTC) will be set when the control circuit commanded by the ECM state does not match the actual state.

OBDII Code P2312 2017 GMC Sierra - Ignition Coil 5 Control Circuit Low Voltage - AutoCodes.com — P2312 2017 GMC Sierra Code - Ignition Coil 5 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2312 2017 GMC Sierra?

Faulty Ignition Coil 5
Ignition Coil 5 harness is open or shorted
Ignition Coil 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2312 2017 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 P2312 2017 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 P2312 2017 GMC Sierra 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 P2312 2017 GMC Sierra Code

1. What does the OBDII code P2312 mean on a 2017 GMC Sierra?

P2312 indicates a "Ignition Coil 5 Control Circuit Low Voltage," meaning the engine control module (ECM) has detected a low voltage issue in the control circuit for ignition coil 5.

2. What are the common symptoms of P2312 in a 2017 GMC Sierra?

Symptoms may include engine misfires, rough idling, reduced engine power, poor fuel economy, or the Check Engine Light being illuminated.

3. What causes the P2312 code to appear?

Common causes include a faulty ignition coil, damaged wiring or connectors in the coil 5 control circuit, a failing ECM, or corrosion at electrical connections.

4. How do I diagnose the P2312 code on my GMC Sierra?

Use an OBDII scanner to confirm the code, inspect the ignition coil 5 and its wiring for damage or corrosion, and test the voltage and resistance in the circuit to ensure proper operation.

5. Can I drive my 2017 GMC Sierra with a P2312 code?

Driving with this code is not recommended as it can lead to engine misfires, reduced performance, and potential damage to other engine components like the catalytic converter.

6. How do I fix the P2312 code on a 2017 GMC Sierra?

Repairs may include replacing the ignition coil for cylinder 5, repairing or replacing damaged wiring or connectors in the circuit, or addressing any issues with the ECM.

7. How much does it cost to fix the P2312 code on a GMC Sierra?

Repair costs vary but typically range from $150 to $400, depending on whether the issue is with the ignition coil, wiring, or ECM.

8. Can a bad spark plug cause the P2312 code?

While spark plugs themselves donâ€™t directly cause this code, a faulty spark plug in cylinder 5 can strain the ignition coil, potentially leading to circuit issues.

9. What tools do I need to troubleshoot the P2312 code?

You'll need an OBDII scanner, a multimeter to test voltage and resistance, and possibly a wiring diagram for the ignition system.

10. How can I prevent the P2312 code from reoccurring?

Regularly inspect and maintain the ignition system, including coils, wiring, and spark plugs, and promptly address any issues to prevent future electrical circuit failures.