Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 Chevrolet Sonic?

• It signals the vehicle’s onboard diagnostics has detected an issue — anything from a loose gas cap to an emissions or engine problem.
• At Larry H. Miller Chevrolet Murray in Murray, UT, our factory-trained technicians use OEM diagnostic tools to identify exact codes quickly and accurately.
• Choosing our dealership often costs less than independent shops over time because our precise diagnostics prevents unnecessary repairs and reduces repeat visits.
• Repairs under any applicable warranty must be completed at a certified dealership to preserve coverage; our team will explain warranty options and offer service financing if needed.
• To get the issue prioritized, you can schedule service online and review current service specials before your visit.

How long does a check engine light service take?

• Most diagnostics are completed the same day — typically within 30 to 90 minutes depending on the code and necessary inspections.
• If repairs are required, our team provides a clear estimate and timeline; we use OEM parts and certified technicians for reliable, long-term results.
• We offer service financing so you can get the needed work done now and pay later, minimizing downtime and getting you back on the road safely.
• Find available discounts and promotions on our service specials page and schedule service to secure a convenient appointment.

How much does a check engine light diagnostic cost for a 2018 Chevrolet Sonic?

• Diagnostics pricing varies, but Larry H. Miller Chevrolet Murray provides transparent pricing and value—often costing less than independent shops when considering accuracy and warranty protection.
• Diagnostics are an investment in immediate and long-term savings: an accurate diagnosis avoids unnecessary parts and repeated labor, preserving the Sonic’s reliability.
• If covered by warranty, repairs must be performed at a certified dealership to maintain coverage; our advisors will confirm warranty eligibility before any work begins.
• To view current offers and arrange an appointment, please visit our service specials page or schedule service now.

What is the most common reason for check engine light on a 2018 Chevrolet Sonic?

• Common causes include a loose or damaged gas cap, faulty oxygen sensors, and catalytic converter issues — each can affect fuel economy and emissions.
• Our certified technicians at Larry H. Miller Chevrolet Murray diagnose the root cause, explain repair options, and use OEM parts to protect performance and resale value.
• Prompt dealership repairs often save money over time by restoring fuel efficiency, avoiding collateral damage, and maintaining warranties.
• You can schedule appointment online and check our service specials to maximize value.

What is the first thing to check when the check engine light comes on?

• Start with the basics: check the gas cap for tightness and visible damage — a simple fix that commonly resolves the light.
• If the light persists, bring your 2018 Chevrolet Sonic to Larry H. Miller Chevrolet Murray for a full diagnostic; we use OEM-grade scanners and certified expertise for accurate results.
• We emphasize transparent estimates, warranty protection, and long-term savings; if repairs are needed, financing options are available so you can address issues promptly.
• To protect your vehicle and warranty, schedule service with our service team and review current service specials before arrival.