Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2025 Toyota Grand Highlander Hybrid?

• Check the gas cap first — a loose or damaged cap is a common, simple cause and can trigger the light.
• Verify fuel level and look for obvious fluid leaks or low oil; addressing fluids can prevent further damage.
• Inspect for recent maintenance or service reminders that might relate to sensors or emissions components.
• If the light persists after basic checks, bring the vehicle to our service team for a proper diagnostic; repairs covered under warranty must be performed at a certified dealership to remain valid.

How much does a check engine light diagnostic cost for a 2025 Toyota Grand Highlander Hybrid?

• At Coggin Toyota at the Avenues, diagnostics are competitively priced; we often cost less than independent shops while providing factory-trained technicians and OEM tools.
• Diagnostic fees typically cover electronic scanning, code interpretation, and a recommended repair plan; any follow-up repair estimate is provided before work begins.
• Choosing our dealership delivers immediate savings through accurate diagnosis and right-first-time repairs, and long-term savings by avoiding costly misdiagnoses and protecting warranty coverage.
• Remember: repairs covered by warranty must be completed at a certified dealership to preserve coverage and ensure OEM parts and procedures are used.

What does it mean when the check engine light comes on in a 2025 Toyota Grand Highlander Hybrid?

• It signals that an emissions, engine, or hybrid system sensor has detected an abnormal condition — codes stored in the vehicle guide diagnosis.
• Common causes include oxygen sensor faults, catalytic converter issues, ignition misfires, or emissions control malfunctions.
• It can also indicate intermittent issues like a weak battery, fuel system irregularities, or software updates needed for hybrid control modules.
• Prompt dealership diagnosis helps prevent escalation, protects hybrid system efficiency, and keeps warranty protections intact when repairs are required.

What is the most common reason for check engine light on a 2025 Toyota Grand Highlander Hybrid?

• One of the most common triggers is a faulty or aging oxygen sensor or related emissions sensor affecting fuel trim and efficiency.
• A loose or damaged gas cap is an easy-to-fix but frequent cause; it triggers evaporative emissions codes.
• Ignition misfires from worn spark plugs or ignition components are also common and can harm catalytic converters if left unchecked.
• Our technicians diagnose the exact cause with OEM-grade tools, often saving you money over time by preventing bigger repairs and ensuring warranty compliance.

How long does a check engine light service take?

• Basic diagnostics can take 30–60 minutes to scan codes, test live data, and perform initial checks; complex issues may require several hours.
• If parts or in-depth testing are needed, we provide a clear timeline and estimate before beginning repairs so you can plan accordingly.
• Our certified technicians and streamlined service processes often reduce total downtime, delivering faster, more reliable repairs than many independent shops.
• For warranty-covered work, having repairs completed at a certified dealership is essential to preserve coverage and ensure OEM parts and documented service procedures.