Frequently Asked Questions

What is the most common reason for check engine light on a 2022 Lexus IS 300?

• Faulty oxygen sensor or emissions component causing incorrect air-fuel readings.
• Loose or damaged gas cap leading to evaporative emissions system faults.
• Ignition system issues such as worn spark plugs or coils that reduce performance.
• Turbocharger-related sensors or boost control faults specific to the 2.0L turbo inline engine.
• Our factory-trained technicians use OEM diagnostics to pinpoint causes quickly and prevent minor faults from becoming major repairs.

What does it mean when the check engine light comes on in a 2022 Lexus IS 300?

• It indicates the vehicle’s onboard diagnostics detected a system outside expected parameters—anything from emissions to engine or sensor issues.
• Codes tell technicians where to start; they do not always indicate the part that must be replaced.
• A steady light usually means a non-urgent fault, while a flashing light signals a condition that can damage the engine or catalytic converter.
• Bringing the car to Nalley Lexus Smyrna ensures proper OEM scanning, accurate diagnosis, and warranty‑eligible repair when required.

How much does a check engine light diagnostic cost for a 2022 Lexus IS 300?

• Diagnostic fees commonly range from modest scan fees to more detailed inspections—typically around $90–$150 depending on the depth of testing required.
• If parts or repairs are needed, we provide transparent estimates before work begins and outline immediate and long‑term savings of dealer-performed repairs.
• Our dealership often costs less than independent shops when you factor in accurate diagnosis, OEM parts, and repairs by factory-trained technicians.
• Any repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure proper service.

How long does a check engine light service take?

• Initial scan and code read typically take 30–60 minutes.
• Full diagnostic tests, road checks, and component inspections can take 1–3 hours depending on complexity.
• If parts are needed, we will provide an estimate and timeline; many routine repairs are completed the same day with scheduled service.
• Using Nalley Lexus Smyrna helps you save time overall through precise diagnostics and fewer follow-up visits compared with less-specialized shops.

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

• Confirm the gas cap is secure and undamaged—it's a common, simple fix that can clear a related code.
• Perform an OBD-II scan to read stored trouble codes and freeze-frame data for accurate diagnosis.
• Listen for unusual noises, check for loss of power or excessive smoke—these signs guide urgency.
• For any code that could affect emissions or drivetrain warranty coverage, have a certified dealership inspect and repair the vehicle.