Frequently Asked Questions

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

• Check the gas cap first — a loose or damaged cap is a common trigger and is simple to fix.
• Verify fluid levels and look for obvious leaks or disconnected hoses under the hood.
• Note changes in performance (stalling, rough idle, loss of power) and whether the light is steady or flashing.
• Record recent fueling, maintenance, or symptoms; this helps our technicians diagnose faster.
• If the issue may be warranty-related, remember warranty repairs must be performed at a certified dealership like Nalley Toyota of Roswell.

What does it mean when the check engine light comes on in a 1999 Toyota RAV4?

• It indicates the vehicle’s onboard computer detected a fault in emissions, ignition, fuel, or sensor systems.
• Causes range from minor (loose gas cap, weak sensor) to serious (misfire, catalytic converter) and affect drivability and emissions.
• A steady light usually signals a non-emergency fault; a flashing light often means a severe misfire that can damage the catalytic converter.
• Bring the vehicle to a certified dealership for accurate diagnostics; repairs done here preserve warranties and often save more over time than independent shops.

What is the most common reason for check engine light on a 1999 Toyota RAV4?

• A loose or faulty gas cap is one of the most frequent triggers and one of the easiest to resolve.
• Other common causes include oxygen sensor failure, ignition misfires (spark plugs/coils), and evaporative emission leaks.
• Ignoring small sensors or leaks can escalate into costly repairs like catalytic converter replacement and reduced fuel economy.
• Our factory-trained technicians diagnose quickly to reduce immediate and long-term costs; many customers find dealership service costs less overall than independent shops.

How much does a check engine light diagnostic cost for a 1999 Toyota RAV4?

• Diagnostics typically range from about $80 to $150 depending on tests required and whether road testing is needed.
• If repairs are needed, we provide transparent estimates and explain immediate vs. long-term savings of dealer service.
• Dealership service often costs less than independent shops when you include warranty protection and work by factory-trained technicians.
• Any repairs covered under warranty must be completed at a certified dealership like Nalley Toyota of Roswell to preserve coverage.

How long does a check engine light service take?

• Basic diagnostics and code read can take 30–60 minutes; more involved diagnostics or intermittent issues may take several hours.
• Repairs vary — a gas cap or sensor replacement is quick, while catalytic converter or complex engine repairs take longer.
• We prioritize efficiency: factory-trained technicians, genuine parts, and direct access to Toyota resources speed service and reduce return visits.
• Scheduling service at Nalley Toyota of Roswell helps ensure fast turnarounds and long-term savings through proper repairs and warranty protection.