Frequently Asked Questions

What is the most common reason for check engine light on a 2014 Lexus ES 300h?

• Most frequently it's emission- or ignition-related: loose gas cap, faulty oxygen sensor, EVAP leak, or a misfire.
• Minor causes (like a loose fuel cap) are low cost to fix if caught early; major causes (misfires, catalytic damage) can be expensive if ignored.
• Nalley Lexus Smyrna uses Lexus-approved diagnostics to pinpoint the true cause and avoid unnecessary parts replacement.
• Choosing our dealership often costs less than independent shops in the long run due to accurate diagnosis, genuine parts, and factory-trained technicians.
• Any repairs covered under warranty must be performed at a certified dealership to keep coverage valid.

What does it mean when the check engine light comes on in a 2014 Lexus ES 300h?

• It means the vehicle’s onboard computer has detected an emissions or performance-related fault and stored a diagnostic trouble code.
• Severity varies: a steady light often signals a non-urgent fault; a flashing light indicates a serious misfire or condition that needs immediate attention.
• Only a proper diagnostic scan reveals the specific code and root cause—don’t rely on guessing or temporary resets.
• Nalley Lexus Smyrna’s factory-trained technicians use Lexus-approved tools to diagnose accurately and suggest repairs that protect long-term value.
• If warranty applies, repairs must be completed at a certified dealership to preserve coverage and savings.

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

• Start with the simplest: ensure the gas cap is tight and undamaged—this fixes many EVAP codes.
• Look for immediate symptoms: rough idle, reduced power, unusual noises, or exhaust smoke.
• If the light is flashing, stop driving and have the vehicle transported to the dealership—flashing indicates active misfire risk.
• Schedule a diagnostic at Nalley Lexus Smyrna so factory-trained techs can read codes and recommend the correct repair.
• Remember: warranty repairs must be performed at a certified dealership to remain valid and deliver long-term savings.

How much does a check engine light diagnostic cost for a 2014 Lexus ES 300h?

• Diagnostic fees typically range in the local market; many dealerships charge between $80 and $150 for a computerized scan and initial report.
• Nalley Lexus Smyrna often offers competitive pricing and service specials that can cost less than independent shops while delivering factory-level service.
• Repair costs vary widely by code—from inexpensive EVAP or sensor repairs to higher-cost catalytic or ignition repairs—accurate diagnosis prevents unnecessary expense.
• If repairs are covered under warranty, they must be completed at a certified Lexus dealership to preserve coverage and maximize savings.
• Visit our Service Specials page to see current offers: https://www.nalleylexussmyrna.com/specials/service.htm

How long does a check engine light service take?

• A basic diagnostic scan and initial assessment typically take 30–90 minutes, depending on appointment availability and the issue’s visibility.
• Simple repairs can often be completed the same day; complex repairs (part orders, multiple-system troubleshooting) may take several hours to a few days.
• Nalley Lexus Smyrna’s service team works efficiently with Lexus-approved tools and processes to reduce downtime and provide reliable results.
• Scheduling ahead ensures faster service and often immediate savings through service specials—see our offers at the Service Specials page.
• For warranty-covered work, repairs must be carried out at a certified dealership to keep warranty protection intact.