AutoCodes – GMC – P2315 GMC

P2315 GMC Code - Ignition Coil 6 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 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 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: P2315 GMC indicates Ignition Coil 6 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 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 625

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 Jul 31, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2315 GMC 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 P2315 GMC - Ignition Coil 6 Control Circuit Low Voltage - AutoCodes.com — P2315 GMC Code - Ignition Coil 6 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2315 GMC?

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

How to Fix the DTC P2315 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 P2315 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 P2315 GMC code?

Need more information on how to fix the P2315 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2315 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P2315 2014 GMC Sierra — Ignition Coil 6 Control Circuit Low Voltage
P2315 2015 GMC Sierra — Ignition Coil 6 Control Circuit Low Voltage
P2315 2016 GMC Sierra — Ignition Coil 6 Control Circuit Low Voltage
P2315 2017 GMC Sierra — Ignition Coil 6 Control Circuit Low Voltage
P2315 2018 GMC Sierra — Ignition Coil 6 Control Circuit Low Voltage

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 P2315 GMC Code

1. What are the common symptoms of OBDII code P2315 in a GMC vehicle?

Symptoms may include engine misfires, rough idling, loss of power, poor fuel efficiency, and illuminated Check Engine Light.

2. What could cause the OBDII code P2315 to trigger in a GMC vehicle?

The code P2315 typically indicates a malfunction in the ignition coil 6 control circuit, which may be caused by a faulty ignition coil, wiring issues, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the source of the low voltage issue in the ignition coil 6 control circuit related to code P2315?

To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the ignition coil for proper functioning, and use a multimeter to check voltage levels in the circuit.

4. Can a DIY enthusiast repair the ignition coil 6 control circuit low voltage issue causing code P2315 in a GMC vehicle?

Repairing the issue may involve replacing a faulty ignition coil, repairing damaged wiring, or addressing ECM problems. While some DIY enthusiasts may be able to perform these tasks, it is recommended to seek professional help for accurate diagnosis and repair.

5. Is it safe to continue driving with OBDII code P2315 present in a GMC vehicle?

Continuing to drive with code P2315 present can lead to further damage to the ignition system and potentially other engine components. It is advisable to address the issue promptly to prevent more severe problems.

6. How much does it typically cost to repair OBDII code P2315 in a GMC vehicle?

The cost of repairing code P2315 can vary depending on the cause of the issue, the extent of the damage, and labor rates in your area. It is recommended to obtain quotes from reputable mechanics or service centers.

7. Are there any preventive measures to avoid encountering OBDII code P2315 in the future?

Regular maintenance, such as checking and replacing ignition components at recommended intervals, can help prevent issues that may trigger code P2315. Additionally, addressing any engine performance issues promptly can help avoid more significant problems.

8. Can a bad spark plug cause OBDII code P2315 to be triggered in a GMC vehicle?

While a bad spark plug can potentially lead to ignition issues, code P2315 specifically relates to the ignition coil 6 control circuit low voltage. It is essential to diagnose the exact cause of the code to ensure the correct repair.

9. Will resetting the Check Engine Light resolve OBDII code P2315 in a GMC vehicle?

Resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing code P2315. It is crucial to diagnose and repair the problem to prevent it from recurring.

10. How long does it typically take to repair the ignition coil 6 control circuit low voltage issue associated with OBDII code P2315?

The repair time can vary depending on the complexity of the issue, the availability of parts, and the mechanic's workload. In general, it may take a few hours to a full day to diagnose and repair the problem.