Frequently Asked Questions

What is the most common reason for check engine light on a 2017 Toyota Highlander Hybrid?

• Common causes include faulty oxygen sensors, loose or damaged gas caps, ignition misfires, catalytic converter inefficiency, and hybrid-system alarms.
• Many issues begin as minor warnings but can escalate—unaddressed misfires or sensor faults often damage the catalytic converter.
• Early diagnosis at Nalley Toyota of Roswell minimizes repair scope and cost, preserving fuel economy and long-term reliability.
• Warranty-covered repairs must be done at a certified dealership to maintain coverage and ensure genuine parts and factory-trained technicians handle the job.

What does it mean when the check engine light comes on in a 2017 Toyota Highlander Hybrid?

• The light indicates the vehicle’s onboard computer detected a fault and logged a diagnostic trouble code (DTC).
• A steady light usually signals a non-urgent issue; a flashing light indicates a severe condition that may cause engine damage.
• Codes cover emissions, engine, and hybrid system components; only a proper scan reveals the specific DTC.
• Bring your Highlander Hybrid to Nalley Toyota of Roswell so factory-trained technicians can diagnose, recommend repairs, and protect any applicable warranty.

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

• Verify basic items first: confirm the gas cap is tightened properly—many faults are simple evaporative emissions issues.
• Observe vehicle behavior: loss of power, rough idle, or unusual noises suggest urgent attention; flashing means stop driving if safe.
• Check dashboard gauges for overheating or low oil warnings, and note any symptoms to share with your service advisor.
• For accurate diagnosis and warranty protection, schedule service with Nalley Toyota of Roswell where certified technicians use OEM tools and parts.

How much does a check engine light diagnostic cost for a 2017 Toyota Highlander Hybrid?

• Diagnostic fees typically range from a modest flat rate to around $80–$150, depending on required tests and vehicle condition.
• If the problem is covered under warranty, diagnostics and covered repairs performed at a certified dealership may be included—warranty repairs must be completed at a certified dealer to remain valid.
• Nalley Toyota of Roswell often costs less than independent shops when you factor in accurate diagnosis, genuine parts, and factory-trained technicians—delivering immediate and long-term savings.
• We provide transparent estimates before work begins and prioritize repairs that preserve vehicle value and prevent higher future costs.

How long does a check engine light service take?

• Basic diagnostics can take 30–90 minutes; simple fixes like tightening a gas cap or clearing a code may be completed the same day.
• Repairs vary: ignition or sensor replacements often take a few hours; catalytic converter or hybrid-system repairs may require longer or parts ordering.
• Nalley Toyota of Roswell uses OEM diagnostic tools and efficient processes, often reducing downtime compared with independent shops while delivering superior, warranty-protected work.
• If repairs are covered by warranty, having them performed at our certified dealership ensures you receive full coverage and documented service history.