Frequently Asked Questions

What is the most common reason for check engine light on a 2023 Toyota RAV4 Prime?

• Loose or faulty gas cap — the simplest cause and often the easiest to fix.
• Oxygen sensor or catalytic converter issues — common as vehicles age and can affect emissions and fuel economy.
• Ignition or fuel system misfires (spark plugs, coils, injectors) — these can harm the catalytic converter if left unattended.
• Evaporative emission system leaks (EVAP) — small leaks can trigger codes and reduce efficiency.
• Bring your vehicle to Nalley Toyota of Roswell for a fast, accurate scan by factory-trained technicians to identify the root cause.

What does it mean when the check engine light comes on in a 2023 Toyota RAV4 Prime?

• It signals the onboard diagnostics detected a fault in emissions, fuel, ignition, or drivetrain systems.
• Codes range from minor warnings to issues that require immediate attention — a scan reveals the exact code.
• A steady light typically indicates a non-emergency issue; a flashing light often means a serious misfire that can damage the catalytic converter.
• Our diagnostic services isolate the problem quickly and outline repair options, including warranty coverage when applicable.

How much does a check engine light diagnostic cost for a 2023 Toyota RAV4 Prime?

• Typical diagnostic scans range from a complementary check during service specials to a modest fee (commonly $80–$150) depending on depth.
• More complex diagnostics or road tests may incur additional charges, which we explain up front.
• Nalley Toyota of Roswell often costs less than independent shops while delivering factory-trained technicians, genuine parts, and documented repairs for long-term savings.
• Remember: repairs covered under warranty must be completed at a certified dealership to keep coverage valid.

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

• Check that the gas cap is tight and free of cracks — an easy first step that resolves many warnings.
• Verify fluid levels and look for obvious signs (smoke, noises, or loss of power) that indicate a serious issue.
• Use a professional diagnostic scan to read stored codes; avoid guessing repairs that can increase long-term costs.
• For accurate diagnosis and warranty protection, bring your 2023 Toyota RAV4 Prime to Nalley Toyota of Roswell for inspection by factory-trained technicians.

How long does a check engine light service take?

• Basic code reading and initial diagnosis typically take 30–60 minutes.
• Comprehensive diagnostics, road tests, or replicated symptoms can take a few hours depending on complexity.
• If repairs are necessary, times vary by the job — simple fixes (gas cap, sensor replacement) can be same-day; larger repairs may require parts and longer scheduling.
• Nalley Toyota of Roswell provides clear time estimates and efficient service; our factory-trained team and parts availability often reduce turnaround and long-term costs compared with independent shops.