Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 Chevrolet Express?

• It signals that your vehicle’s onboard diagnostics has detected an issue — anything from a loose gas cap to an emissions or engine performance fault. Our certified technicians at Larry H. Miller Chevrolet Murray will read the stored trouble codes and explain their significance in plain language.
• We often find common causes such as misfires, oxygen sensor failures, EVAP leaks, or catalytic converter issues. Fixing problems early preserves fuel economy and prevents costly secondary damage, delivering immediate and long-term savings versus delaying repairs.
• Any repair covered under warranty must be completed at a certified dealership to keep your coverage intact. We honor warranties, use OEM parts, and document repairs precisely for long-term vehicle value and peace of mind.
• We offer service financing so you can get repairs now and pay later. To book, please schedule service online or check current service specials.

How long does a check engine light service take?

• Most diagnostics are completed within one visit — typically 30–90 minutes for the initial scan and code review. If parts or additional testing are needed, we’ll give a clear timeline before work begins.
• Larry H. Miller Chevrolet Murray prioritizes quick turnaround with factory-trained technicians and direct access to OEM parts, which reduces downtime and helps you get back on the road sooner.
• We often cost less than independent shops while offering higher-level service, transparent estimates, and documented repairs that protect your vehicle’s longevity.
• To minimize interruption, schedule appointment online and review current service specials for additional savings.

How much does a check engine light diagnostic cost for a 2020 Chevrolet Express?

• Our diagnostics are competitively priced and provide a complete scan, code interpretation, and recommended next steps. Performing diagnostics at a certified dealership often yields immediate and long-term savings through accurate diagnosis and OEM repairs.
• We offer transparent estimates and will explain repair options, warranties, and available discounts so you can choose the best solution for your needs.
• Remember: warranty-covered repairs must be performed at a certified dealership to remain valid. We also offer service financing so necessary repairs can be done now and paid over time.
• Ready to proceed? Schedule service or browse our service specials before your visit.

What is the most common reason for check engine light on a 2020 Chevrolet Express?

• Common triggers include misfires (P0300 series), oxygen sensor or catalytic converter issues (P0130–P0420 series), EVAP leaks (P0442), and fuel trim or sensor faults (P0171/P0174).
• Addressing these early prevents reduced fuel economy, drivability problems, and expensive downstream repairs. Our technicians diagnose root causes rather than just clearing codes.
• We use OEM parts and manufacturer-approved procedures to maximize reliability and maintain vehicle value. Warranty repairs must be done at certified locations, and we handle those precisely.
• To get an accurate diagnosis, schedule service at Larry H. Miller Chevrolet Murray and check available service specials.

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

• Start with basics: ensure the gas cap is tight. A loose cap commonly triggers EVAP system codes. If the light persists, don’t drive long distances — have a certified technician evaluate the issue.
• At our dealership we run a full scan, explain the trouble codes, and recommend cost-effective repairs that protect engine life and fuel economy.
• We offer service financing so you can address issues promptly to avoid larger costs later, and any warranty-covered work must be performed at a certified dealership like ours.
• Use our convenient online tools to schedule appointment or review current service specials before you visit.