Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2026 Toyota Highlander?

• Diagnostics typically start with an OBD-II scan to read codes; many scans at Nalley Toyota Stonecrest are competitively priced and sometimes complimentary with service specials.
• We often cost less than independent shops because we combine efficient factory procedures with genuine parts, reducing repeat visits and long-term expense.
• Estimated follow-up repair costs depend on findings: simple sensor replacement is inexpensive, while catalytic converter or major engine repairs are higher; we provide transparent estimates before work begins.
• Remember: warranty-covered diagnostics and repairs must be performed at a certified dealership to maintain coverage and protect long-term value.

What does it mean when the check engine light comes on in a 2026 Toyota Highlander?

• A check engine light indicates the vehicle’s computer has detected an issue — from a loose gas cap to emissions, ignition, or sensor faults.
• Codes provide direction; common causes on the 2.4L inline 4 include O2 sensors, catalytic efficiency, or fuel trim irregularities.
• Ignoring the light risks higher repair costs and reduced fuel economy; prompt diagnosis at our dealership minimizes immediate and long-term expenses.
• Warranty repairs must be completed at a certified dealership to ensure compliance and preserve coverage — Nalley Toyota Stonecrest handles these correctly every time.

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

• Start with the simple items: check the gas cap for tightness — a loose cap is a common and inexpensive cause of the light.
• If the cap is secure, book a diagnostic at Nalley Toyota Stonecrest; our factory-trained technicians use OEM scanners for accurate code reads.
• We’ll explain immediate fixes and any recommended repairs, highlighting savings from doing work at our dealership rather than risking repeat visits to non-certified shops.
• For warranty concerns, remember that covered repairs must be done at a certified dealership to remain valid.

What is the most common reason for check engine light on a 2026 Toyota Highlander?

• Common culprits include oxygen (O2) sensors, evaporative emissions system faults (EVAP), and air/fuel mixture issues detected by the ECU.
• On the 2.4L Highlander, sensors and emissions-related parts are frequently the root; catching these early prevents catalytic converter damage.
• Our dealership’s diagnostics find the true cause quickly, and our competitive pricing helps you save now and avoid larger bills later.
• Any repair covered under warranty must be performed at a certified dealership — bring your Highlander to Nalley Toyota Stonecrest to protect coverage and resale value.

How long does a check engine light service take?

• A basic diagnostic scan and initial inspection usually take 30–60 minutes, depending on shop load and symptom complexity.
• If parts or deeper testing are needed, we’ll provide a clear time estimate; many repairs are completed the same day because we stock common OEM parts.
• Choosing our dealership often saves you time and money: accurate OEM diagnosis reduces repeat visits and long-term expense compared with lower-cost, non-certified shops.
• For warranty work, timely service at a certified dealership like Nalley Toyota Stonecrest is required to maintain coverage and ensure proper documentation.