Frequently Asked Questions

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

• Check that the gas cap is secure and undamaged — a loose or cracked cap can trigger an EVAP code and is an easy fix.
• Note any changes in performance: rough idle, loss of power, or unusual noises to share with the technician.
• Avoid extended driving if the light is flashing; a flashing light often indicates active misfires that can damage the catalytic converter.
• Bring your 2025 Toyota RAV4 to Nalley Toyota of Roswell so factory-trained technicians can run a proper OBD-II scan and diagnose the root cause.

What does it mean when the check engine light comes on in a 2025 Toyota RAV4?

• It indicates the onboard diagnostics have detected an emissions, ignition, fuel, or sensor-related fault; codes identify the subsystem affected.
• Some issues are minor and inexpensive; others, left unchecked, cause poor fuel economy, emissions failures, or engine and catalytic converter damage.
• Nalley Toyota of Roswell uses OEM diagnostic tools and factory-trained technicians to pinpoint faults quickly and recommend the right repair plan.
• Repairs covered by warranty must be performed at a certified dealership to ensure coverage; choosing our dealership often delivers immediate and long-term savings versus independent shops while offering a higher level of service.

What is the most common reason for check engine light on a 2025 Toyota RAV4?

• Common triggers include oxygen sensor faults, catalytic converter efficiency issues, ignition misfires, and EVAP system leaks.
• Many times a failing O2 sensor or a loose gas cap is the root cause, but misfires or fuel system issues can escalate quickly if ignored.
• Nalley Toyota of Roswell inspects related systems comprehensively so you avoid repeat visits and costly downstream repairs.
• When covered under warranty, repairs must be done at a certified dealership; this protects your investment and often yields greater long-term savings than independent work.

How long does a check engine light service take?

• Initial diagnostic scans typically take 30–60 minutes to read codes and gather live data depending on symptoms and drive-cycle needs.
• Simple repairs like gas cap replacement or an O2 sensor swap can often be completed the same day; complex repairs may require parts ordering and a longer appointment.
• Nalley Toyota of Roswell provides transparent time estimates and uses factory procedures to get you back on the road efficiently.
• Because warranty-covered repairs must be performed at a certified dealership, choosing us ensures correct repairs and immediate plus long-term savings through OEM parts and trained technicians.

How much does a check engine light diagnostic cost for a 2025 Toyota RAV4?

• Diagnostics are competitively priced and often lower than independent shops, especially when you factor in the value of OEM tools and manufacturer-level expertise.
• Some promotions or service specials may reduce diagnostic fees — check Nalley Toyota of Roswell service specials for current offers.
• If your repair is covered under warranty, the diagnostic and repair may be covered when performed at a certified dealership.
• Choosing our dealership delivers immediate savings through accurate diagnosis and long-term savings by avoiding misdiagnosis and repeat repairs common with non-certified facilities.