Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2026 Lexus RX 350h?

• Typical diagnostic fees range from an estimated $90–$150 depending on inspection depth and testing required.
• Nalley Lexus Roswell often delivers lower out-the-door costs than independent shops by using factory tools and efficient workflows that reduce time and parts waste, creating immediate savings.
• Long-term savings come from precise repairs, genuine parts and factory-trained technicians that prevent repeat failures and protect resale value.
• Remember: any repairs covered under warranty must be performed at a certified dealership to keep coverage intact.

What does it mean when the check engine light comes on in a 2026 Lexus RX 350h?

• The light signals the vehicle’s onboard diagnostics detected a fault — anything from a loose gas cap to an engine misfire or emissions system issue.
• It can indicate decreased fuel economy, rough running, increased emissions or a component failure that will worsen if ignored.
• Our technicians use Lexus-specific scanners to read codes, pinpoint root causes and recommend correct, lasting repairs.
• If a repair is warranty-covered, having it done at a certified dealership ensures proper documentation and continued coverage.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes depending on code complexity and road testing needs.
• Simple fixes like tightening a gas cap or replacing a sensor may be completed the same day; multi-step repairs require time for parts and detailed diagnosis.
• At Nalley Lexus Roswell, factory-trained technicians and dedicated bays speed turnaround without cutting corners, delivering both quick service and quality workmanship.
• If warranty work is needed, having us perform it preserves coverage and avoids future out-of-pocket costs.

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

• Start with obvious checks: ensure the gas cap is tightened and inspect for dashboard warnings or performance changes.
• If the vehicle runs rough or the light is flashing, stop driving and get professional diagnostics immediately to avoid engine or catalytic converter damage.
• Bring your RX 350h to Nalley Lexus Roswell where technicians will read stored codes and perform targeted testing with Lexus factory tools.
• Prompt dealership diagnosis can save money now and later — warranty repairs must be completed at a certified dealer to maintain coverage.

What is the most common reason for check engine light on a 2026 Lexus RX 350h?

• Common triggers include a loose or faulty gas cap, oxygen sensor issues, or minor fuel/air trim problems that affect emissions.
• Less common but more serious causes include misfires, catalytic converter degradation or EV/ hybrid system alerts; these require prompt attention.
• Nalley Lexus Roswell’s inspections identify whether the issue is simple or requires deeper repair, reducing unnecessary part replacement.
• Because warranty repairs must be done at certified dealers, choosing our service center secures coverage and often costs less overall than repeat fixes from non-certified shops.