Frequently Asked Questions

What is the most common reason for check engine light on a 1995 Toyota Avalon?

• Common causes include a loose or faulty gas cap, oxygen sensor failure, catalytic converter issues, ignition misfires from worn spark plugs or coils, and EVAP system leaks.
• Many problems start small—like a loose cap or aging O2 sensor—but can lead to higher emissions, reduced fuel economy, and costly catalytic converter damage if ignored.
• Our factory-trained technicians diagnose the root cause quickly using OEM tools to reduce immediate and long-term repair costs compared with repeated quick fixes.
• Repairs covered under warranty must be completed at a certified dealership to preserve coverage and ensure proper OEM parts and procedures are used.

What does it mean when the check engine light comes on in a 1995 Toyota Avalon?

• A steady light usually signals an emissions or sensor issue; a flashing light indicates a severe misfire that can damage the catalytic converter.
• It can indicate anything from an evaporative system leak or faulty oxygen sensor to ignition misfires or fuel delivery problems.
• Timely dealership diagnosis prevents escalation; Nalley Toyota of Roswell offers accurate scans, OEM parts, and factory-trained technicians to save you money over time.
• If a repair is covered by warranty, work must be done at a certified dealership to maintain coverage and ensure long-term savings.

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

• Start with simple checks: ensure the gas cap is tightened and inspect for obvious dashboard warnings or unusual noises.
• If the light is flashing or you notice power loss, stop driving and have the vehicle towed to the dealership to avoid further damage.
• If the light is steady and there are no drivability symptoms, schedule a diagnostic scan; Nalley Toyota of Roswell can often diagnose the cause the same day.
• Remember: warranty-covered repairs must be completed at a certified dealership to protect your coverage and deliver long-term savings.

How much does a check engine light diagnostic cost for a 1995 Toyota Avalon?

• Diagnostic scan fees commonly range from modest flat fees to promotional offers; exact pricing varies by service and promotion.
• At Nalley Toyota of Roswell we often offer competitive diagnostic pricing and can waive or apply the fee toward repairs, leading to immediate and long-term savings versus repeated independent attempts.
• Using dealership diagnostics and OEM procedures reduces the chance of misdiagnosis and additional costs later; warranty repairs must be performed at a certified dealership.
• Contact our service department for current diagnostic rates and specials: see Service Specials at /specials/service.htm or schedule online.

How long does a check engine light service take?

• Typical diagnostic scans take around 30–90 minutes; simple repairs like replacing a gas cap or sensor may be completed within a few hours.
• More complex repairs—such as catalytic converter replacement or intermittent misfires—can take longer, sometimes requiring parts ordering or extended inspection.
• Our dealership’s factory-trained technicians and parts availability help minimize downtime and reduce total ownership costs over time.
• For warranty-covered repairs, scheduling at a certified dealership ensures proper documentation and preserves your warranty benefits.