Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2022 Lexus RX 350L?

• Diagnostic fees vary, but our dealership often offers competitive pricing and promotions; diagnostic scans are frequently lower-cost than independent shops when factoring in accurate troubleshooting and warranty coverage.
• We use factory-grade scanners and manufacturer software to identify codes precisely, reducing repeat visits and saving you money long term.
• Any repairs covered under warranty must be performed at a certified dealership to maintain coverage — that protects you from future out-of-pocket expense.
• Ask about service specials and online scheduling at our service specials page to learn current diagnostic pricing.

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

• Start with simple items: ensure the fuel cap is tight and undamaged — a loose cap can trigger codes and is quick to fix.
• Check for obvious issues like low oil, unusual smells, or smoke; those signs warrant immediate attention.
• Have a certified diagnostic scan performed as soon as practical — our factory-trained technicians will read codes and recommend repairs that preserve warranty coverage.
• Using the dealership ensures accurate diagnosis, genuine parts, and both immediate and long-term savings compared with repeated fixes.

What does it mean when the check engine light comes on in a 2022 Lexus RX 350L?

• The light indicates the vehicle’s onboard computer has logged a fault code — issues range from minor (loose fuel cap) to serious (misfire, catalytic converter problem).
• A non-flashing light often means reduced emissions efficiency or sensor faults; a flashing light typically signals an active misfire and potential engine damage.
• Proper diagnosis at a certified dealership ensures warranty-covered repairs are performed correctly and protects long-term vehicle value.
• Nalley Lexus Roswell uses manufacturer tools to identify root causes quickly, often costing less overall than independent shops by avoiding unnecessary parts and repeat labor.

How long does a check engine light service take?

• Diagnostic scans typically take 30–60 minutes; once codes are read, repair time depends on the issue — simple fixes may be same-day while complex repairs require more time.
• At our dealership, factory-trained technicians prioritize accurate diagnosis to minimize return visits and long-term cost.
• If a repair is covered under warranty, it must be completed at a certified dealership to maintain coverage — we’ll advise estimated repair time and any available loaner or shuttle options.
• Schedule through our online service portal to confirm availability and expected turnaround times.

What is the most common reason for check engine light on a 2022 Lexus RX 350L?

• Common causes include loose or faulty gas caps, oxygen sensor failures, mass air flow or fuel trim issues, and ignition misfires.
• Ignoring common issues can reduce fuel economy, increase emissions, and lead to costly component failures like a damaged catalytic converter.
• Bringing your RX 350L to Nalley Lexus Roswell ensures swift, accurate repairs with genuine parts and factory diagnostics, which often results in lower lifetime service costs than repeated independent-shop fixes.
• Remember that warranty-covered repairs must be completed at a certified dealership to preserve coverage and protect resale value.