Frequently Asked Questions

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

• It signals that the vehicle’s onboard diagnostics detected an issue — anything from an emissions sensor to ignition or fuel-system irregularities. Our technicians in MA use GM factory tools to read codes and explain repair needs in plain language.
• We often find simple fixes such as a loose gas cap or a sensor replacement; addressing issues early prevents larger repairs and improves fuel economy, saving you money now and later.
• Warranty work or recalls must be completed at a certified dealership like Herb Chambers Chevrolet to preserve coverage; we handle documentation and repair under warranty when applicable.
• We offer service financing so you can get necessary repairs now and pay later, and our team will always recommend the most cost-effective solution for your vehicle.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes depending on the issue; many root causes are identified the same day at Herb Chambers Chevrolet thanks to our factory-grade scanners and experienced technicians.
• If a battery, sensor, or minor component is needed, most replacements are completed during the same visit — minimizing downtime and getting you back on the road fast.
• We provide transparent estimates and timelines; choosing our dealership often costs less than independent shops when you factor in lasting repairs, OEM parts, and long-term reliability.
• To prioritize your visit, schedule appointment online and check available service specials before you arrive.

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

• Diagnostics at Herb Chambers Chevrolet typically start at $93.45 for a check engine light scan and report; this competitive pricing reflects our efficient process and factory diagnostic tools.
• While price varies by repair, our dealership often costs less than independent shops when you factor in OEM parts, technician expertise, and the long-term savings of proper repairs.
• Any repairs covered under warranty must be performed at a certified dealership to maintain coverage; we’ll verify warranty status and present repair options clearly.
• We also offer service financing so you can address issues promptly and avoid escalation into more expensive repairs.

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

• The most frequent causes include oxygen sensor faults, catalytic converter issues, ignition or spark plug problems, and loose gas caps. Ignoring these can reduce fuel efficiency and lead to larger repairs.
• Our technicians use GM-specific diagnostics to pinpoint the exact code and recommend the least disruptive, most cost-effective repair path that preserves vehicle longevity.
• Choosing dealership service brings added value: OEM parts, certified techs, clear warranty guidance, and documentation that protects resale value.
• To act quickly and reduce long-term costs, schedule service and review applicable service specials.

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

• Start with simple checks: ensure the gas cap is secure and then have a diagnostic scan performed. A loose or damaged gas cap is a common and inexpensive fix.
• If the light persists or flashes, bring your 2020 Chevrolet Impala to Herb Chambers Chevrolet immediately — a flashing light can indicate a severe misfire that risks catalytic converter damage.
• We emphasize transparency and long-term savings: our technicians will provide a clear estimate, explain warranty coverage, and recommend repairs that preserve performance and fuel economy.
• Use our online tools to schedule appointment and explore current service specials before you arrive.