Frequently Asked Questions

What is the most common reason for check engine light on a 2019 Lexus IS 350?

• Loose or damaged gas cap and small evaporative emissions leaks are the most frequent, and they are often simple, inexpensive fixes.
• Oxygen sensor faults and fuel system issues are next most common and can affect fuel economy and emissions if not addressed.
• Ignoring these warnings can lead to larger, costlier repairs later, such as catalytic converter damage.
• At Nalley Lexus Smyrna we diagnose accurately with factory-grade tools to avoid unnecessary repairs and save you money long term.

What does it mean when the check engine light comes on in a 2019 Lexus IS 350?

• It signals the engine management or emissions system has detected an issue — range from minor (gas cap) to serious (misfire, emissions control).
• Possible causes include sensor failures, fuel delivery problems, ignition misfires, or exhaust system issues that affect performance and emissions.
• Immediate diagnosis prevents collateral damage; our factory-trained technicians use OEM procedures to find the true cause quickly.
• When repairs are covered by warranty, the work must be performed at a certified dealership to preserve coverage and ensure correct parts and labor.

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

• Check the gas cap: ensure it is tightened and not damaged — this simple step fixes many warnings and restores proper system pressure.
• Note any changes in drivability (loss of power, rough idle, strange noises) and avoid extended driving if symptoms are severe.
• Do not reset the light yourself before diagnosis; clearing codes can hide developing faults and complicate warranty claims.
• Schedule a diagnostic at Nalley Lexus Smyrna; we provide swift diagnostics, transparent pricing, and warranty-respecting repairs.

How long does a check engine light service take?

• Basic diagnostic scans typically take 30–60 minutes; more complex issues or road tests can extend the appointment to a few hours.
• If parts are needed, repair time depends on part availability; many common items are stocked at our service center to reduce wait time.
• Our factory-trained technicians follow efficient OEM workflows to minimize downtime and deliver reliable results the first time.
• Choosing Nalley Lexus Smyrna often yields immediate and long-term savings compared with independent shops because we prevent repeated, ineffective repairs.

How much does a check engine light diagnostic cost for a 2019 Lexus IS 350?

• Diagnostic fees vary by complexity—many dealerships offer a standard diagnostic rate or promotional pricing; please check our Service Specials for current offers.
• An initial scan may be modest cost, while labor and parts depend on the specific repair; common sensor replacements typically cost less than full exhaust or engine repairs.
• Nalley Lexus Smyrna often costs less than independent shops once you factor in correct repairs, OEM parts, and warranty protection—reducing long-term ownership costs.
• Remember, any warranty-covered repairs must be performed at a certified dealership to preserve coverage and ensure correct, lasting repairs.