AutoCodes – GMC – P2312 2015 GMC Sierra

P2312 2015 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 2015 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 184

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 2015 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 2015 GMC Sierra - Ignition Coil 5 Control Circuit Low Voltage - AutoCodes.com — P2312 2015 GMC Sierra Code - Ignition Coil 5 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2312 2015 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 2015 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 2015 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 2015 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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P2312 (Ignition Coil 5 Control Circuit Low Voltage) in a 2015 GMC Sierra?

- Common symptoms may include engine misfires, rough idling, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of OBDII code P2312 in a 2015 GMC Sierra?

- Possible causes may include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the underlying issue causing OBDII code P2312 in my 2015 GMC Sierra?

- Diagnosing the issue involves inspecting the ignition coil and its wiring for any visible damage, testing the coil with a multimeter, and checking the ECM for proper functioning.

4. Can I continue driving my 2015 GMC Sierra with OBDII code P2312 present?

- It is not recommended to continue driving with this code active, as it can lead to further engine damage and potential safety hazards. It is advisable to address the issue promptly.

5. How can I repair OBDII code P2312 (Ignition Coil 5 Control Circuit Low Voltage) in my 2015 GMC Sierra?

- Repair typically involves replacing the faulty ignition coil, repairing damaged wiring or connectors, and resetting the fault code with an OBDII scanner.

6. Is it possible to reset OBDII code P2312 in a 2015 GMC Sierra without fixing the underlying issue?

- While you can reset the code with an OBDII scanner, it is important to address the root cause of the problem to prevent it from reoccurring and potentially causing more significant issues.

7. What is the average cost to repair OBDII code P2312 in a 2015 GMC Sierra?

- The cost can vary depending on the exact cause of the issue, but replacing an ignition coil and addressing related wiring problems can typically range from $150 to $300 at a repair shop.

8. Are there any preventive measures to avoid OBDII code P2312 in a 2015 GMC Sierra?

- Regular maintenance, such as inspecting and replacing ignition components at recommended intervals, can help prevent issues like code P2312 from occurring.

9. Can weather conditions or driving habits contribute to triggering OBDII code P2312 in a 2015 GMC Sierra?

- Extreme weather conditions or frequent driving in stop-and-go traffic can potentially strain the ignition system and contribute to issues like low voltage in the ignition coil circuit.

10. How long does it typically take to repair OBDII code P2312 (Ignition Coil 5 Control Circuit Low Voltage) in a 2015 GMC Sierra?

- The repair process can usually be completed within a few hours, but it may vary depending on the accessibility of the ignition coil and the extent of any wiring repairs needed.