Frequently Asked Questions

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

• Check the gas cap: a loose, damaged, or missing gas cap is a very common cause and often clears the code after tightening or replacing.
• Look for obvious leaks or low fluid levels—especially oil—that can trigger warnings or engine performance issues.
• Note changes in performance: rough idle, loss of power, or unusual noises can indicate a more serious issue that needs immediate attention.
• Scan for trouble codes with an OBD-II reader; however, we recommend certified diagnosis at Nalley Toyota Stonecrest to ensure accuracy and protect warranty coverage.

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

• It signals that the vehicle’s engine management system detected an issue—ranging from minor emissions faults to misfires or sensor failures.
• Common triggers include evaporative emission leaks, oxygen sensor faults, catalytic converter efficiency issues, or ignition/misfire events.
• Severity varies: a steady light often indicates a non-emergency fault; a flashing light typically signals a serious misfire that can damage the catalytic converter.
• For accurate diagnosis and to preserve warranty benefits, have factory-trained technicians at Nalley Toyota Stonecrest inspect and repair the vehicle.

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

• Diagnostics at Nalley Toyota Stonecrest are competitively priced and often cost less than independent shops when factoring in the quality of service and genuine parts.
• A standard electronic diagnostic scan typically covers code reading and a technician’s initial assessment; full diagnostic fees vary depending on the depth of testing required.
• Immediate savings come from precise diagnosis and correctly targeted repairs; long-term savings result from OEM parts, factory procedures, and avoiding repeat repairs.
• Repairs covered under warranty must be performed at a certified dealership to maintain coverage—our factory-trained technicians use OEM parts and certified procedures.

How long does a check engine light service take for a 2025 Toyota Grand Highlander Hybrid?

• Initial code reading and a basic inspection usually take 30–60 minutes; more complex diagnostics, road tests, or component testing can take several hours.
• If parts are required, repair time depends on part availability—many common parts are stocked at Nalley Toyota Stonecrest to minimize downtime.
• Our technicians follow OEM procedures and thorough testing protocols; this efficient, correct service often saves time and money versus repeated visits to independent shops.
• For warranty-covered repairs, certified-dealership completion is required; scheduling ahead helps expedite service and reduce your wait time.

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

• A loose or faulty gas cap is one of the simplest and most frequent causes—easy to fix but still capable of triggering an emissions code.
• Other common causes include oxygen sensor failures, evaporative emissions leaks (EVAP), and ignition misfires or spark plug/coils issues.
• Untreated sensor faults or misfires can increase fuel use and damage emissions control components, raising repair costs over time.
• Prompt diagnosis and repair at Nalley Toyota Stonecrest limit long-term costs and ensure any warranty-covered work is completed by certified technicians.