P0354 2018 GMC Sierra Code - Ignition Coil 4 Control Circuit
Quick Answer
The P0354 diagnostic trouble code (DTC) for a 2018 GMC Sierra specifically relates to the Ignition Coil 4 Control Circuit. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Defective Engine Control Module (ECM). 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 2018 GMC Sierra indicates Ignition Coil 4 Control Circuit.
- Common causes
- Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Defective Engine Control Module (ECM).
- 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 P0354 2018 GMC Sierra Description
The P0354 diagnostic trouble code (DTC) for a 2018 GMC Sierra specifically relates to the Ignition Coil 4 Control Circuit. This code indicates a malfunction in the control circuit for ignition coil 4, which is responsible for producing the high voltage necessary to ignite the air-fuel mixture in the combustion chamber. The ignition coil converts the low voltage from the battery into the high voltage needed for spark plugs to ignite the fuel, creating the combustion necessary for the engine to run.
Common Causes of P0354 2018 GMC Sierra
- Faulty ignition coil
- Damaged wiring or connectors in the ignition coil circuit
- Defective Engine Control Module (ECM)
- Worn-out or damaged spark plugs
- Electrical issues such as a short circuit or open circuit in the ignition coil control circuit
Symptoms of P0354 2018 GMC Sierra
- Rough idling or engine misfires
- Decreased fuel efficiency
- Engine stalling or hesitation during acceleration
- Illuminated check engine light
- Reduced engine performance or power
How to Fix P0354 2018 GMC Sierra
- Begin by diagnosing the specific cause of the issue using a scan tool to read the DTC and pinpoint the faulty component.
- Inspect the ignition coil 4, wiring, and connectors for any visible damage or wear. Replace any damaged components.
- Test the resistance of the ignition coil to ensure it falls within the manufacturer's specifications.
- If the ignition coil is determined to be faulty, replace it with a new, high-quality component.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved and the code does not return.
Cost to Fix P0354 2018 GMC Sierra
The cost of repairing the P0354 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the cost of parts and labor in your area. On average, replacing an ignition coil can cost between $100 and $300, while the labor costs can range from $50 to $150 per hour. Additional costs may apply if other components need to be replaced or if further diagnosis is required. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on your vehicle's specific needs.
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