Frequently Asked Questions

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

• Typical diagnostic fees range from $80–$150 depending on the depth of testing and whether live-data or road-testing is required.
• If the problem requires parts or repairs, our estimates are transparent; we explain immediate costs and projected long‑term savings from fixing the root cause.
• Nalley Toyota Union City often costs less than independent shops while providing factory-trained technicians and genuine Toyota parts, delivering better value over time.
• Repairs covered by warranty must be completed at a certified dealership to preserve coverage; we handle warranty diagnostics and repairs directly.
• Ask about current service offers at /specials/service.htm and schedule online for quicker service at /new-inventory/index.htm.

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

• A steady check engine light indicates the vehicle detected an emissions, sensor, or engine-management fault that needs diagnostic scanning.
• Common causes include a loose gas cap, oxygen sensor failure, ignition misfire, EVAP system leak, or catalytic converter inefficiency.
• Severity ranges from minor (tighten cap, clear code) to serious (engine misfire or catalytic damage) that affect fuel economy and emissions.
• Nalley Toyota Union City uses OEM diagnostic tools to identify the exact fault, recommend repairs, and explain immediate vs. long-term cost benefits of service here.
• If covered under warranty, repairs must be performed at a certified dealership to guarantee coverage and proper documentation.

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

• Start with the basics: ensure the gas cap is fully tightened — a loose cap is a common EVAP system trigger.
• Look for secondary warnings or drivability issues: poor acceleration, rough idle, or unusual smells suggest higher urgency.
• If the light is flashing or you detect severe symptoms, stop driving and contact us; continued driving can cause further damage.
• For peace of mind and accurate diagnosis, schedule a quick scan at Nalley Toyota Union City where factory tools and technicians prioritize safety and warranty compliance.

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

• One of the most frequent triggers is an EVAP system issue—often from a loose or damaged gas cap—leading to emissions-related fault codes.
• Other common causes include oxygen sensor failures, ignition misfires (spark plugs or coils), and worn catalytic converters.
• Ignoring common faults increases fuel use and repair costs; early dealer diagnosis saves money immediately and over the vehicle’s life.
• Our factory-trained technicians will confirm the cause, present repair options, and explain how dealership service preserves warranty coverage and long-term value.

How long does a check engine light service take?

• A basic diagnostic scan is often completed in 30–60 minutes; more complex issues requiring road tests or component testing can take 1–3 hours.
• Simple repairs (tighten cap, replace sensor) may be same-day; major repairs (catalytic converter, engine repairs) require additional time and parts ordering.
• Nalley Toyota Union City schedules efficiently to minimize downtime; we often deliver faster, more reliable service than independents and save you money over time.
• If a repair is covered under warranty, it must be completed at a certified dealership—our team handles warranty authorization and documentation to streamline service.