AutoCodes – GMC – P2312 2014 GMC Sierra

P2312 2014 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 2014 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 166

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 2014 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 2014 GMC Sierra - Ignition Coil 5 Control Circuit Low Voltage - AutoCodes.com — P2312 2014 GMC Sierra Code - Ignition Coil 5 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2312 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code

What does the OBDII code P2312 mean on a 2014 GMC Sierra?

1. P2312 indicates a low voltage issue in the control circuit of ignition coil 5, which can affect the engine's ignition system. 2.

What are the common symptoms of code P2312 on a 2014 GMC Sierra?

Symptoms may include engine misfires, rough idling, reduced power, poor fuel economy, and the check engine light turning on. 3.

What causes the P2312 code to appear on a 2014 GMC Sierra?

Common causes include a faulty ignition coil, damaged wiring or connectors in the coil 5 circuit, a malfunctioning Powertrain Control Module (PCM), or corroded electrical connections. 4.

Can I drive my 2014 GMC Sierra with the P2312 code active?

Driving with this code is not recommended as it can lead to engine misfires, reduced performance, and potential damage to the catalytic converter over time. 5.

How do I diagnose the P2312 code on my 2014 GMC Sierra?

Diagnostics involve using a scan tool to verify the code, visually inspecting ignition coil 5 and its wiring, testing the coil with a multimeter, and checking for PCM-related issues. 6.

How do I fix the P2312 code on a 2014 GMC Sierra?

Repairs may include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, and addressing any PCM software updates or malfunctions. 7.

What tools are needed to fix the P2312 code on a 2014 GMC Sierra?

Youâ€™ll need an OBDII scanner, a multimeter for testing voltage and continuity, and basic hand tools for removing and replacing components. 8.

How much does it cost to repair the P2312 code on a 2014 GMC Sierra?

Repair costs can vary, but replacing an ignition coil typically ranges from $50 to $150 for parts, plus labor if done by a mechanic. 9.

Can a dirty or damaged spark plug cause the P2312 code on a 2014 GMC Sierra?

While unlikely, a dirty or damaged spark plug can strain the ignition coil, potentially contributing to the issue. Inspect and replace spark plugs if needed. 10.

How can I prevent the P2312 code from recurring on my 2014 GMC Sierra?

Regular maintenance, including inspecting ignition coils and wiring, keeping connectors clean and secure, and replacing spark plugs as recommended, can help prevent this code.