Frequently Asked Questions

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

• Check that the gas cap is tightened properly — a loose or damaged cap is a common, inexpensive cause.
• Look for obvious signs: smells, smoke, reduced power, or unusual noises that indicate a severe problem.
• If simple checks don’t resolve it, bring your 2014 Toyota Avalon Hybrid to Nalley Toyota of Roswell for a proper scan.
• Our factory-trained technicians use OEM scanners to read codes and recommend repairs; warranty-covered repairs must be done at a certified dealership.

What does it mean when the check engine light comes on in a 2014 Toyota Avalon Hybrid?

• It signals the vehicle’s OBD-II system has detected an issue — anything from a loose gas cap to an emissions or engine malfunction.
• Codes returned by the scanner guide diagnosis: some are minor, others require immediate attention to avoid damage.
• Nalley Toyota of Roswell offers a full diagnostic that identifies root causes and prevents costly follow-up repairs, providing both immediate and long-term savings compared with patchwork fixes.
• Remember, repairs covered by warranty must be completed at a certified dealership to maintain coverage.

How much does a check engine light diagnostic cost for a 2014 Toyota Avalon Hybrid?

• Diagnostic fees vary, but you can expect an industry-typical range; exact pricing is provided after an initial scan and inspection.
• At Nalley Toyota of Roswell we often cost less than independent shops while providing factory-trained technicians, OEM parts, and transparent estimates.
• Choosing the dealership delivers immediate savings by identifying the correct repair and long-term savings by preventing repeat failures or unnecessary parts replacement.
• If a repair is covered under warranty, it must be performed at a certified dealership to preserve your protection.

How long does a check engine light service take?

• Simple diagnostics and minor fixes (e.g., gas cap, sensor replacement) can be completed within an hour or a few hours.
• More involved repairs — fuel, ignition, or emissions systems — may require parts ordering and can take a day or longer.
• Nalley Toyota of Roswell provides realistic time estimates up front and prioritizes efficient service to reduce downtime and cost.
• When covered under warranty, repairs must be done at a certified dealership; our trained technicians expedite warranty work to minimize disruption.

What is the most common reason for check engine light on a 2014 Toyota Avalon Hybrid?

• The most frequent causes include an EVAP leak (loose/damaged gas cap), oxygen sensor issues, or catalytic efficiency faults.
• Many of these start small but can escalate — quick diagnosis avoids worsening fuel economy and higher repair costs.
• Our dealership’s diagnostic approach pinpoints the issue and often saves you money versus trial-and-error repairs at independents.
• Any warranty-covered repairs must be completed at a certified dealer to maintain coverage and ensure OEM-quality parts and procedures.