Frequently Asked Questions

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

• Typical diagnostic fees range from about $90–$200 depending on the depth of testing and whether we perform road tests or live-data analysis.
• Our dealership often costs less than independent shops while delivering factory-trained technicians, OEM parts, and manufacturer-grade diagnostic tools—delivering immediate and long-term savings.
• If a repair is covered under warranty it must be performed at a certified dealership to preserve coverage; we will document findings and explain warranty options before any work.
• We provide clear estimates and will prioritize repairs that prevent further damage and higher downstream costs.

What is the first thing to check when the check engine light comes on for a 2026 Toyota Grand Highlander?

• Start with basics: a loose or missing gas cap can trigger an EVAP code; tighten the cap and re-check the light after a few drive cycles.
• Next, a quick OBD-II scan will reveal stored trouble codes; our service team uses Toyota-specific scanners for accurate code interpretation.
• If codes indicate a mechanical or emissions issue we recommend scheduling service; remember warranty-covered repairs must be done at a certified dealership.
• Addressing the issue early at our dealership often reduces overall repair costs and protects vehicle performance and resale value.

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

• The light indicates the powertrain control module detected an emissions, fuel, ignition, or sensor-related fault — the onboard computer stores one or more diagnostic codes.
• Codes can range from simple issues like an EVAP leak to more serious misfires or turbocharger problems on the 2.4L turbocharged engine.
• Our factory-trained technicians diagnose with Toyota-calibrated tools to identify root causes, preventing unnecessary parts replacement and saving you money over time.
• Remember: repairs covered under warranty must be completed at a certified dealership to remain valid and to deliver the long-term savings you expect.

How long does a check engine light service take for a 2026 Toyota Grand Highlander?

• Basic diagnostics typically take 30–90 minutes for code reading, live-data review, and a preliminary inspection.
• If additional testing or repairs are required, total time varies; our team will provide a realistic estimate and explain immediate vs. recommended repairs.
• We prioritize efficiency and accuracy using manufacturer tools so you get prompt service and avoid repeat visits—this delivers immediate and long-term savings compared with slower, less-specialized shops.
• Any warranty-covered repairs must be done at a certified dealership; we’ll coordinate parts and service quickly to minimize downtime.

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

• Common triggers include EVAP leaks (loose gas cap or small vapor leaks), oxygen sensor issues, and occasional misfires; the turbocharged 2.4L can also show boost-related codes.
• Often these are caught early by diagnostics and repaired affordably; leaving them unaddressed can escalate costs and harm emissions systems.
• Our dealership’s trained technicians and OEM diagnostics identify the true cause to avoid unnecessary spending and to protect warranty coverage.
• Choosing Nalley Toyota Union City means you benefit from accurate diagnosis, warranty-compliant repairs, and cost savings over time.