Frequently Asked Questions

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

• Check the gas cap: a loose or damaged gas cap is a common, easy fix for a 2026 Toyota Grand Highlander and can trigger the light.
• Look for obvious issues: low oil, unusual smells, or smoke; stop driving if you detect these signs.
• Note driving behavior: recent hard starts, stalls, or poor acceleration help technicians diagnose the issue faster.
• Bring it to Toyota of Greenville: our factory-trained technicians perform a proper scan and recommend repairs to protect warranty coverage.
• Cost advantage: we often cost less than independent shops up-front and deliver long-term savings through OEM parts and correct repairs the first time.

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

• Typical diagnostic fees range from $100–$200, but exact pricing depends on needed tests and parts; Toyota of Greenville provides transparent estimates.
• Diagnostics may be waived or credited toward repair when you choose our dealership for the service, providing immediate savings.
• Using a certified dealer ensures warranty-covered repairs are completed by factory-trained technicians with OEM parts.
• Long-term savings come from correct repairs that prevent repeat failures and protect components like the catalytic converter.
• Ask about current service specials at /specials/service.htm for additional savings.

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

• The light indicates the vehicles onboard diagnostics (OBD-II) detected an issue—anything from an emissions sensor to engine misfire.
• Codes read by a scanner point to specific systems (oxygen sensor, catalytic converter, misfire, EVAP, etc.).
• Some issues are minor; others can cause poor fuel economy, increased emissions, or damage if left untreated.
• Treatments range from a simple gas cap replacement to sensor or catalytic converter repairs; timely dealer service reduces total ownership costs.
• Warranty repairs must be performed at a certified dealership to maintain coverage and ensure OEM parts and procedures are used.

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

• Faulty oxygen sensors and EVAP system issues (like a loose gas cap) are among the most frequent causes for this model.
• Other common causes include ignition misfires, mass airflow sensor faults, and catalytic converter efficiency problems.
• Early diagnosis at Toyota of Greenville prevents escalation and helps maintain fuel economy (21 city / 28 highway) and performance.
• Our factory-trained techs use OEM scans and parts to ensure repairs are correct and warranty-compliant.
• Choosing our dealership often yields lower immediate and lifetime costs compared with independent shops due to accurate diagnostics and fewer repeat repairs.

How long does a check engine light service take?

• Initial diagnostics typically take 30–60 minutes, depending on complexity and the need for road tests or extended system checks.
• Simple fixes (gas cap, sensor replacement) can often be completed the same day; more involved repairs may require parts and additional time.
• Toyota of Greenville schedules work efficiently and offers clear timelines so you understand immediate and long-term savings from proper repairs.
• Warranty-covered work must be done at a certified dealership; our factory-trained technicians ensure repairs are performed to OEM standards.
• Contact our service team or view service specials to arrange prompt service and reduce downtime.