Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2024 Toyota Grand Highlander Hybrid?

• Diagnostics typically range from $79 to $199 depending on testing depth and parts required.
• Nalley Toyota of Roswell often costs less than independent shops while delivering factory-trained technicians and genuine Toyota parts.
• Immediate savings come from accurate diagnosis that avoids unnecessary repairs; long-term savings come from correct repairs and preserved warranty coverage.
• Any repairs covered under warranty must be performed at a certified dealership to maintain coverage and proper documentation.

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

• Verify the gas cap is tight and undamaged—this common issue often triggers the light and is easy to fix.
• Scan for accompanying warnings, unusual noises, or fluid leaks that indicate a more serious problem.
• If the check engine light is flashing, stop driving when safe and contact Nalley Toyota of Roswell immediately to avoid damage.
• For warranty-protected repairs, have work performed at a certified dealership to preserve coverage and using OEM parts.

What does it mean when the check engine light comes on in a 2024 Toyota Grand Highlander Hybrid?

• The light indicates the engine control system has detected a fault—ranging from a minor sensor issue to a serious emissions or engine problem.
• Common causes include oxygen sensor faults, ignition misfires, EVAP leaks, or catalytic converter degradation.
• Nalley Toyota of Roswell provides accurate scanning to identify exact codes and recommends manufacturer-correct repairs.
• Using our dealership saves money immediately and long term by ensuring proper repairs with OEM parts and factory-trained technicians; warranty repairs must be completed at a certified dealership.

What is the most common reason for check engine light on a 2024 Toyota Grand Highlander Hybrid?

• A loose or faulty gas cap is the single most frequent cause and is usually quick and inexpensive to correct.
• Other typical causes include oxygen sensor failures, ignition misfires, and EVAP system leaks.
• Prompt diagnosis and repair at Nalley Toyota of Roswell often costs less than independent shops over time by preventing escalation and repeat visits.
• Warranty-covered repairs must be completed at a certified dealership to keep coverage intact and ensure genuine replacement parts.

How long does a check engine light service take?

• Basic diagnostics usually take 30–90 minutes; full repairs depend on the specific fault and parts availability.
• Nalley Toyota of Roswell offers efficient scheduling, same-day diagnostics when possible, and streamlined parts fulfillment to minimize downtime.
• Factory-trained technicians provide definitive repairs that reduce repeat visits and long-term ownership costs.
• Remember that warranty repairs must be performed at a certified dealership to retain coverage and documented service history.