AutoCodes – Chevrolet – P2318 2014 Chevrolet Silverado

P2318 2014 Chevrolet Silverado Code - Ignition Coil 7 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 7, Ignition Coil 7 harness is open or shorted, Ignition Coil 7 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: P2318 2014 Chevrolet Silverado indicates Ignition Coil 7 Control Circuit Low Voltage.
Common causes: Common causes include Faulty Ignition Coil 7, Ignition Coil 7 harness is open or shorted, Ignition Coil 7 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 428

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 P2318 2014 Chevrolet Silverado 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 P2318 2014 Chevrolet Silverado - Ignition Coil 7 Control Circuit Low Voltage - AutoCodes.com — P2318 2014 Chevrolet Silverado Code - Ignition Coil 7 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2318 2014 Chevrolet Silverado?

Faulty Ignition Coil 7
Ignition Coil 7 harness is open or shorted
Ignition Coil 7 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2318 2014 Chevrolet Silverado?

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 P2318 2014 Chevrolet Silverado 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 P2318 2014 Chevrolet Silverado code?

Need more information on how to fix the P2318 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2318 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P2318 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2318 in a 2014 Chevrolet Silverado?

- Common symptoms include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What does the OBDII code P2318 "Ignition Coil 7 Control Circuit Low Voltage" mean for a 2014 Chevrolet Silverado?

- This code indicates that there is a low voltage condition detected in the control circuit of ignition coil 7.

3. What are the possible causes of OBDII code P2318 in a 2014 Chevrolet Silverado?

- Potential causes include a faulty ignition coil, damaged wiring or connectors, a malfunctioning PCM, or a problem with the ignition coil driver circuit.

4. How can I diagnose the issue causing OBDII code P2318 in my 2014 Chevrolet Silverado?

- You can diagnose the problem by inspecting the ignition coil, checking the wiring and connectors for damage, and using a multimeter to test the voltage in the control circuit.

5. Can I still drive my 2014 Chevrolet Silverado with OBDII code P2318 active?

- It is not recommended to drive with this code active, as it can lead to further engine damage and reduced performance.

6. How can I repair OBDII code P2318 in my 2014 Chevrolet Silverado?

- Repair options include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, or addressing any issues with the PCM.

7. Is it possible to clear OBDII code P2318 in a 2014 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is crucial to address the root cause to prevent the issue from reoccurring.

8. Can a DIY enthusiast fix OBDII code P2318 in a 2014 Chevrolet Silverado?

- Depending on your skill level and access to tools, you may be able to address this issue yourself by replacing the ignition coil or repairing wiring, but professional help is recommended for complex diagnostics.

9. How much does it typically cost to fix OBDII code P2318 in a 2014 Chevrolet Silverado at a repair shop?

- The cost can vary depending on the exact cause of the issue, but expect to pay for parts, labor, and diagnostic fees, which can range from $100 to $500 or more.

10. Will OBDII code P2318 cause permanent damage to my 2014 Chevrolet Silverado if left unresolved?

- Ignoring this code can potentially lead to more severe engine problems over time, so it's best to address the issue promptly to prevent further damage.