Frequently Asked Questions

How long does a check engine light service take?

• Most diagnostic visits at Nalley Toyota Stonecrest take between 30 minutes and 2 hours, depending on the complexity of codes and any follow-up testing required.
• If repairs are needed, simple fixes like sensor replacements can often be completed the same day; more involved repairs may require parts ordering and additional time.
• We provide clear time estimates before starting work and prioritize fast turnarounds without cutting corners.
• Our factory-trained technicians use Toyota-specific tools to speed accurate diagnosis, delivering immediate savings and reducing repeat visits and long-term costs compared with many independent shops.

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

• The light signals the vehicle’s onboard diagnostics has detected an emissions, fuel, ignition, or sensor issue; it does not always mean immediate danger, but it should be checked promptly.
• Common triggers include loose gas caps, oxygen sensors, catalytic converter faults, or misfires; severity ranges from minor to engine-damaging.
• At Nalley Toyota Stonecrest we read manufacturer codes and explain necessary steps, from simple resets to recommended repairs, emphasizing warranty protection for covered items.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and maximize long-term savings.

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

• Start with the gas cap—ensure it’s tightened properly. A loose or damaged cap commonly triggers an emissions code.
• If the light stays on after checking the cap, schedule a diagnostic; Nalley Toyota Stonecrest offers fast onsite scanning to identify specific codes.
• Our technicians check fault histories, live sensor data, and related systems to determine whether you need immediate repair or a monitored condition.
• Using dealership service ensures any warranty issues are preserved and can often cost less than independent shops when factoring in long-term reliability and genuine parts.

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

• The most frequent causes are oxygen sensor faults, loose gas caps, and catalytic converter or EVAP system issues—these affect emissions monitoring and fuel efficiency.
• Sporadic misfires or ignition issues can also illuminate the light and, if left unchecked, may harm engine components over time.
• At our dealership, technicians prioritize diagnostics that prevent escalation, saving you money now and reducing costly repairs later.
• We emphasize certified repairs because warranty-covered work must be performed at a certified dealership to remain valid and to deliver the best long-term value.

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

• Diagnostic fees vary, but Nalley Toyota Stonecrest offers transparent pricing and service specials; initial scans are competitively priced and often lower than independent shops when considering accurate OEM diagnosis.
• If a repair is needed, we outline immediate and long-term cost implications so you can choose the best path forward.
• Using our dealership often provides savings through genuine parts, technician expertise, and warranty protection—repairs covered under warranty must be completed by a certified dealership.
• Contact our service team or visit our service specials page for current offers and to schedule an appointment quickly online.