AutoCodes – GMC – P0358 2015 GMC Sierra

P0358 2015 GMC Sierra Code - Ignition Coil 8 Control Circuit

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 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: P0358 2015 GMC Sierra indicates Ignition Coil 8 Control Circuit.
Common causes: Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 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 200

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 Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0358 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 P0358 2015 GMC Sierra - Ignition Coil 8 Control Circuit - AutoCodes.com — P0358 2015 GMC Sierra Code - Ignition Coil 8 Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0358 2015 GMC Sierra?

Faulty Ignition Coil 8
Ignition Coil 8 harness is open or shorted
Ignition Coil 8 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0358 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 P0358 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 P0358 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 P0358 2015 GMC Sierra Code

What does the OBDII code P0358 mean for a 2015 GMC Sierra?

P0358 indicates a problem with the ignition coil 8 control circuit. The engine control module (ECM) is detecting an issue in the electrical signal sent to or from ignition coil 8.

What are the common symptoms of code P0358?

Symptoms include engine misfires, reduced engine performance, rough idle, difficulty starting, and possibly an illuminated check engine light.

What causes the P0358 code on a 2015 GMC Sierra?

Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a defective ECM, or issues with spark plugs.

Can I drive my GMC Sierra with code P0358?

Itâ€™s not recommended to drive with this code for extended periods, as misfires can lead to engine damage and reduced fuel efficiency.

How can I diagnose the P0358 code?

Inspect the wiring and connectors for ignition coil 8, check for spark plug issues, test the ignition coil, and verify proper signals from the ECM.

What tools are needed to fix the P0358 code?

You may need an OBDII scanner, a multimeter, basic hand tools, and possibly an ignition coil tester for diagnosis and repair.

How do I fix code P0358 on my GMC Sierra?

Repairs may include replacing the ignition coil, repairing damaged wiring or connectors, replacing the spark plugs, or reprogramming the ECM if necessary.

What is the cost to repair the P0358 code?

Repair costs vary but typically range from $100 to $300 for parts and labor, depending on if only the ignition coil or additional components need replacement.

Can a bad spark plug cause the P0358 code?

Yes, a worn or damaged spark plug can lead to ignition coil issues and trigger this code due to improper combustion.

How do I prevent the P0358 code from appearing again?

Regular maintenance, such as inspecting ignition components, replacing spark plugs as recommended, and keeping the wiring harnesses in good condition, can help prevent recurrence.