Frequently Asked Questions

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

• Loose or damaged gas cap — an easy fix that often clears the code after a few drive cycles.
• Evaporative emissions (EVAP) leaks, faulty O2 sensors, or vacuum leaks — common emission-related triggers.
• Ignition issues such as worn spark plugs, coils, or injector problems that can create misfire codes.
• Hybrid-specific sensors or battery management alerts — less frequent but important to address at a certified dealership.
• Bringing your Highlander Hybrid to Nalley Toyota Stonecrest saves you money long-term — we often cost less than independent shops while providing factory-trained technicians and warranty protection.

How long does a check engine light service take?

• Basic code read and inspection: typically 30–60 minutes with OEM diagnostic tools.
• Detailed diagnosis: 1–3 hours depending on intermittent faults or complex hybrid system checks.
• Repairs vary — simple fixes (gas cap, sensor swap) can be same-day; more involved repairs (catalytic converter, hybrid modules) take longer and require parts ordering.
• Choosing Nalley Toyota Stonecrest provides faster, accurate turnaround because our technicians use factory procedures and genuine parts, reducing repeat visits and long-term cost.
• Remember: warranty repairs must be completed at a certified dealership to retain coverage and ensure proper documentation.

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

• It signals a detected fault in the powertrain or emissions system — from minor issues to serious malfunctions.
• Could indicate emissions control, ignition, fuel delivery, or hybrid system sensor problems; the light does not diagnose itself.
• A steady light usually means a non-emergency condition that still needs prompt attention to avoid damage or decreased fuel economy.
• If the light accompanies other warnings or reduced performance, have the vehicle inspected immediately at Nalley Toyota Stonecrest to protect warranty and avoid costly downstream repairs.
• Our factory-trained technicians use Toyota diagnostic tools to find root causes quickly, saving you time and money over trial-and-error fixes.

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

• Ensure the gas cap is tight — a loose cap is a frequent, simple cause that often resolves itself after driving.
• Note vehicle behavior: reduced power, odd noises, or flashing lights require immediate attention and may call for towing to the dealership.
• Check for other dashboard warnings and record any recent fueling or service events to share with technicians.
• Contact Nalley Toyota Stonecrest for a prompt diagnostic appointment — our inspections use OEM scans that preserve warranty eligibility and identify true causes.
• For warranty-covered repairs, always have work performed at a certified dealership to ensure coverage and correct repairs.

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

• Typical diagnostic fees range from about $80 to $160 depending on testing depth; many dealerships apply the fee toward repairs.
• Complex hybrid or intermittent issues can require additional diagnostic time and tests, which may change the price — your advisor will explain costs upfront.
• Nalley Toyota Stonecrest often costs less than independent shops overall because our accurate diagnostics prevent unnecessary parts replacement and follow manufacturer procedures.
• Choosing dealer service delivers immediate savings from correct first-time fixes and long-term savings by protecting the vehicle and warranty.
• Remember: any repairs covered under warranty must be performed at a certified dealership to maintain coverage and proper documentation.