AutoCodes – GMC – P0354 GMC

P0354 GMC Code - Ignition Coil 4 Control Circuit

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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: P0354 GMC indicates Ignition Coil 4 Control Circuit.
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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 6,945

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0354 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 P0354 GMC - Ignition Coil 4 Control Circuit - AutoCodes.com — P0354 GMC Code - Ignition Coil 4 Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0354 GMC?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0354 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 P0354 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 P0354 GMC code?

Need more information on how to fix the P0354 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0354 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0354 2014 GMC Sierra — Ignition Coil 4 Control Circuit
P0354 2015 GMC Sierra — Ignition Coil 4 Control Circuit
P0354 2016 GMC Sierra — Ignition Coil 4 Control Circuit
P0354 2017 GMC Sierra — Ignition Coil 4 Control Circuit
P0354 2018 GMC Sierra — Ignition Coil 4 Control Circuit

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 P0354 GMC Code

1. What are common symptoms of OBDII code P0354 in a GMC vehicle?

- Common symptoms include engine misfires, rough idling, poor acceleration, and illuminated Check Engine Light.

2. What does the OBDII code P0354 GMC indicate?

- The code P0354 indicates a problem with the ignition coil 4 control circuit in the vehicle.

3. What are possible causes of the P0354 code in a GMC vehicle?

- Possible causes include a faulty ignition coil, damaged wiring or connectors, a defective Engine Control Module (ECM), or a problem with the spark plug.

4. How can I diagnose the issue causing the P0354 code in my GMC vehicle?

- You can diagnose the issue by checking the ignition coil, inspecting the wiring and connectors for damage, testing the spark plug, and using a scan tool to monitor the ignition coil circuit.

5. Is it safe to drive with the OBDII code P0354 in my GMC vehicle?

- It is not recommended to drive with the code P0354 as it can lead to further engine damage and reduced performance.

6. Can I repair the ignition coil 4 control circuit issue causing the P0354 code myself?

- While some DIY enthusiasts may be able to replace the ignition coil or check wiring connections, it is recommended to have a professional mechanic diagnose and repair the issue to ensure proper resolution.

7. How much does it typically cost to repair the P0354 code in a GMC vehicle?

- The cost of repairing the P0354 code can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Are there any preventive maintenance tips to avoid the ignition coil 4 control circuit issue in a GMC vehicle?

- Regularly servicing the ignition system, replacing spark plugs as recommended, and ensuring proper engine maintenance can help prevent issues leading to the P0354 code.

9. Can a bad ignition coil cause other OBDII codes to appear in a GMC vehicle?

- Yes, a faulty ignition coil can cause other related codes to appear, such as misfire codes or additional ignition coil circuit codes.

10. How long does it take to repair the ignition coil 4 control circuit issue triggering the P0354 code?

- The repair time can vary depending on the exact cause of the issue and the mechanic's expertise, but it typically takes 1-2 hours to diagnose and repair the problem.