Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2023 Toyota Highlander Hybrid?

• Diagnostics typically start with an OBD-II scan and inspection; at our dealership we offer transparent, flat-fee diagnostic pricing tailored to the issue found.
• Many causes are inexpensive to repair (gas cap, sensor) while others can require parts and labor; our upfront estimate shows immediate costs and anticipated long-term savings.
• Nalley Toyota of Roswell often costs less than independent shops because our factory-trained technicians diagnose right the first time, avoiding repeat visits and unnecessary parts.
• Remember: any repairs covered by warranty must be performed at a certified dealership to protect coverage and ensure genuine parts and proper calibration.

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

• Start simple: check the gas cap — a loose or damaged cap can trigger a code and is an inexpensive fix.
• If the cap is secure, schedule a prompt diagnostic; our technicians use OEM-level scanners to read the exact fault codes for the 2023 Toyota Highlander Hybrid.
• Do not ignore the light: early diagnosis at Nalley Toyota of Roswell delivers immediate savings by preventing escalation to more costly repairs.
• Warranty-covered repairs must be completed at a certified dealership to preserve coverage and maximize long-term value.

What does it mean when the check engine light comes on in a 2023 Toyota Highlander Hybrid?

• The light signals the vehicle’s onboard diagnostics system detected a fault — anything from emissions components to ignition or hybrid-system sensors.
• Codes are descriptive, not diagnostic: our trained technicians interpret codes in context (driving history, symptoms, and hybrid-specific sensors) to find the root cause.
• Prompt dealer diagnosis prevents small issues from becoming major repairs and often results in lower overall ownership costs compared with repeated independent attempts.
• If a repair is covered under warranty, it must be performed at a certified dealership to ensure correct procedures, genuine parts, and warranty protection.

What is the most common reason for check engine light on a 2023 Toyota Highlander Hybrid?

• Common causes include oxygen sensor faults, catalytic converter efficiency codes, and intermittent misfires — hybrid-specific sensors and EVAP system leaks also appear regularly.
• Many faults start small (sensor wear, loose fittings) and are affordable when addressed early at the dealership.
• Nalley Toyota of Roswell’s factory-trained techs identify whether the issue is a simple fix or a larger repair so you avoid repeated, costly work often seen at less-equipped shops.
• Warranty repairs must be performed at a certified dealership to retain coverage and ensure lasting value.

How long does a check engine light service take?

• Initial diagnostics usually take 30–90 minutes, depending on symptom complexity and whether test drives or live-data recording are needed.
• If a simple repair is required (gas cap, sensor swap), many jobs can be completed the same day; complex repairs may require ordering parts and a follow-up appointment.
• Using Nalley Toyota of Roswell typically reduces total downtime because our technicians use factory tools and access OEM parts and software updates immediately.
• For warranty-covered work, certified-dealership completion is required; this preserves coverage and can save you significant money over time by preventing recurring issues.