Frequently Asked Questions

What is the most common reason for check engine light on a 2025 Lexus ES 300h?

• Common triggers include a loose or damaged gas cap, faulty oxygen sensor, EVAP system leaks, ignition misfires, and catalytic converter issues.
• Left unaddressed, small issues can escalate into costly repairs—oxygen sensors or EVAP fixes often cost a few hundred dollars, while converter failures can exceed $1,000.
• Our factory-trained technicians diagnose the root cause quickly, helping you avoid bigger bills and preserving fuel economy and emissions compliance.
• We often cost less than independent shops because our efficient diagnostics and OEM parts deliver immediate and long-term savings; warranty-covered repairs must be done at a certified dealership.

What does it mean when the check engine light comes on in a 2025 Lexus ES 300h?

• The light signals a detected issue with the engine, emissions or powertrain systems—severity ranges from minor emissions faults to conditions that can harm the engine.
• A steady light usually indicates a non-urgent fault; a flashing light signals a serious misfire that requires immediate attention to prevent damage.
• Our quick scan identifies the specific error codes, then technicians recommend targeted repairs using OEM parts to restore performance and efficiency.
• Choosing dealer service provides faster, more accurate diagnostics, plus warranty protection and greater long-term savings compared with piecemeal fixes.

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

• First, check for obvious issues: ensure the gas cap is tight and inspect for dashboard messages, unusual smells, or performance changes such as rough idle or loss of power.
• If the light is flashing or the car runs poorly, stop driving and have the vehicle inspected immediately to avoid further damage.
• For a thorough check, bring your 2025 Lexus ES 300h to our service team—factory-trained technicians perform an OBD-II scan and a targeted inspection.
• Using Nalley Lexus Roswell saves you money over time: precise diagnosis prevents unnecessary repairs and preserves warranty coverage, which requires certified-dealership service for covered work.

How much does a check engine light diagnostic cost for a 2025 Lexus ES 300h?

• Diagnostic scan fees typically range, but at Nalley Lexus Roswell we offer competitive pricing and service specials—many diagnostics fall into an affordable range compared with the downstream cost of unresolved problems.
• Because we use OEM tools and factory expertise, our precise diagnosis often saves money by preventing incorrect part replacements and repeat visits.
• Immediate and long-term savings include improved fuel economy, avoided catalytic converter or engine damage, and proper warranty documentation for covered repairs.
• Remember: repairs covered under warranty must be performed at a certified dealership to keep coverage valid; review our current offers at Service Specials.

How long does a check engine light service take?

• Typical diagnostic scans require 30–90 minutes; that time includes reading codes, performing basic inspections and road checks when needed.
• Minor repairs—like replacing a gas cap, oxygen sensor or spark plug—can often be completed the same day; complex repairs may require parts ordering and take longer.
• Our certified technicians and streamlined parts department help minimize downtime; we can often service your vehicle faster and more reliably than independent shops, producing both immediate and long-term savings.
• For warranty repairs, bringing your vehicle to a certified dealership ensures proper documentation and preserves coverage; schedule online or visit our service specials page.