Frequently Asked Questions

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

• Diagnostic fees at our dealership typically cover computerized scanning, visual inspection, and technician time so you get an accurate report of root causes.
• Costs vary by issue; simple fixes like a loose gas cap are minimal, while sensor or emission repairs are higher. We provide transparent estimates before any work.
• Choosing Nalley Toyota Union City often costs less than independent shops when you factor immediate accuracy, OEM parts, and long-term savings from correct repairs the first time.
• Warranty repairs must be performed at a certified dealership to remain valid — our factory-trained technicians handle covered work and documentation for you.

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

• The light signals that the vehicle’s onboard diagnostics detected an issue with engine, emissions, or related systems; it ranges from minor to urgent.
• Common causes include emission system leaks, faulty sensors, misfires, or fuel system irregularities — only a scan yields the exact code.
• Our dealership uses OEM diagnostic tools to identify codes precisely, preventing misdiagnosis and unnecessary parts replacement.
• When covered by warranty, repairs 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 with basics: ensure the gas cap is tight and undamaged — a loose or faulty cap is a frequent trigger and an easy fix.
• If the cap is secure, have the vehicle scanned promptly so codes can guide next steps rather than guessing at symptoms.
• Document any recent fuel, maintenance, or performance changes for technicians; this speeds diagnosis and reduces repair time.
• If the problem is warranty-related, remember repairs must be completed at a certified dealership to keep coverage intact.

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

• Frequent causes include oxygen sensor faults, catalytic efficiency issues, EVAP leaks, and occasional misfires — these affect emissions and economy.
• Many triggers start small but can lead to larger damage or reduced fuel economy if not addressed promptly.
• Our factory-trained technicians identify root causes quickly, using OEM parts and calibrated procedures to avoid repeated trips to the shop.
• For warranty-covered items, repairs must be performed at a certified dealership to maintain coverage and ensure long-term savings.

How long does a check engine light service take?

• Initial diagnostics usually take 30–60 minutes, depending on symptom complexity and required inspections.
• Simple repairs can be completed the same day; more involved repairs or parts orders extend the timeline—our team provides clear time estimates up front.
• We often save customers time and money versus independent shops by diagnosing correctly the first time and stocking common OEM parts.
• If a repair is warranty-covered, having work performed here ensures proper documentation and faster resolution under warranty rules.