Frequently Asked Questions

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

• Typical diagnostic fees range from a basic OBD-II scan at $50–$120 to a full inspection depending on symptoms.
• At Bill Estes Toyota we often cost less than independent shops while delivering factory-trained technicians and OEM parts, producing immediate and long-term savings.
• Diagnostic fees are frequently credited toward repairs when completed at our dealership; remember warranty-covered repairs must be performed at a certified dealership to preserve coverage.
• More complex repairs (sensors, catalytic converter, ignition) will add part and labor costs; we provide transparent estimates before work begins.

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

• It signals the onboard diagnostics detected an emission or powertrain issue — from a loose gas cap to sensor faults or misfires.
• Common causes include O2 sensor or catalytic converter concerns, misfires, EVAP leaks, or fuel system irregularities in the 2.4L inline-4 engine.
• Severity varies: a steady light often means routine diagnosis is needed; a flashing light suggests a serious misfire requiring immediate attention.
• Bring the vehicle to our service center for a precise code read and professional evaluation to avoid costly secondary damage.

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

• Start with the simplest: ensure the gas cap is tightened properly — a loose cap frequently triggers a code.
• Note any drivability symptoms: reduced power, rough idle, unusual smells, or smoke — document them before arrival.
• Check basic fluid levels and dashboard warnings, but avoid clearing codes yourself; erasing codes can mask underlying problems and affect warranty claims.
• If the light is flashing or the vehicle runs poorly, stop driving and arrange towing to our dealership to prevent further damage.

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

• One of the most frequent triggers is ignition misfires (P0300-series) caused by spark plugs, coils, or fuel delivery problems.
• Other common causes include a loose gas cap, oxygen sensor failure, or an EVAP system leak — all detected by the 2.4L engine's diagnostics.
• Ignoring these codes can lead to catalytic converter damage and far higher repair costs; prompt dealer diagnosis reduces long-term expense.
• Certified dealership repairs use OEM parts and preserve warranty protections; warranty-covered work must be completed at a certified dealer.

How long does a check engine light service take?

• Simple scans and minor repairs often complete within 30–90 minutes; comprehensive diagnostics and parts repair can take several hours to a day.
• Our factory-trained technicians use dealer-level tools to quickly pinpoint codes and recommend repairs, improving turnaround time.
• We provide clear estimates and scheduling for more involved work; doing repairs at our dealership often yields immediate savings and fewer return visits.
• For warranty-related items, service must be performed at a certified dealership to maintain coverage and ensure long-term protection.