Frequently Asked Questions

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

• Loose or damaged gas cap — a simple EVAP system fault that often triggers a code and is quick to correct.
• Oxygen sensor or O2 heater faults, which affect emissions and fuel trim over time.
• Evaporative emissions leaks (EVAP) and purge valve issues are frequent after fueling or age-related wear.
• Misfires caused by spark plugs, ignition coils, or fuel delivery can trigger long-term engine damage if ignored.
• Our factory-trained technicians at Nalley Toyota of Roswell diagnose the root cause to avoid unnecessary parts replacement and long-term expense.

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

• It indicates the vehicle’s onboard diagnostics detected a parameter outside expected ranges — from minor emissions faults to engine performance issues.
• Lights can signal simple issues like a loose gas cap or more serious problems like misfires or catalytic converter inefficiency.
• Immediate professional diagnostics prevent escalation: our scan tools read OBD-II codes and live data to pinpoint faults.
• Repairs covered under warranty must be performed at a certified dealership to preserve coverage; Nalley Toyota of Roswell handles warranty work promptly.
• Choosing our dealership often reduces immediate and long-term costs due to accurate diagnostics, OEM parts, and factory-trained service techs.

How long does a check engine light service take?

• Typical diagnostic scans and initial code readings take 30–60 minutes depending on symptoms and required road or static tests.
• Simple fixes such as tightening a gas cap or replacing a sensor can be completed the same day; more involved repairs may require parts and additional time.
• When warranty work is needed, we coordinate approvals and complete certified repairs to avoid repeat visits.
• Our trained technicians work efficiently with OEM procedures, often delivering faster and more reliable service than piecemeal repairs.
• Contact Nalley Toyota of Roswell to schedule service; we keep you informed of time estimates and cost-saving options.

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

• Diagnostic fees typically range based on time and tests required; many customers see estimates in a modest, transparent range for an OBD-II scan and inspection.
• Nalley Toyota of Roswell frequently costs less than independent shops while providing factory diagnostics, OEM parts, and technician expertise.
• Choosing the dealership can produce immediate savings through accurate diagnosis and long-term savings by preventing unnecessary parts replacement.
• If an issue is covered under warranty, repairs must be performed at a certified dealership to keep coverage valid — we handle those repairs end-to-end.
• Check our Service Specials for current offers and contact us for an exact diagnostic price and appointment time.

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

• Check the gas cap for proper seating — a loose or cracked cap is the easiest and most common fix.
• Look for dashboard warnings, reduced power mode, unusual noises, or smells; flashing lights or drivability changes demand immediate attention.
• If the light is steady and there are no performance issues, schedule a diagnostic soon to avoid escalation.
• For flashing lights or drivability loss, stop driving and have the vehicle inspected by Nalley Toyota of Roswell to prevent engine damage and preserve warranty coverage.
• Use our online Service Specials or schedule service at https://www.toyotaofroswell.com to get certified inspection and repair.