Frequently Asked Questions

What is the most common reason for check engine light on a 2019 Toyota Highlander Hybrid?

• Common causes include misfires, worn oxygen sensors, or catalytic efficiency codes (P0300, P0420-type issues).
• Left unaddressed, misfires and sensor faults can damage the catalytic converter — a costly repair compared with early service.
• Nalley Toyota of Roswell diagnoses these quickly with factory-grade tools, often saving you money over independent shops while delivering higher service levels.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and related long-term savings.

What does it mean when the check engine light comes on in a 2019 Toyota Highlander Hybrid?

• The light indicates the onboard diagnostics detected a fault in emissions, ignition, fuel, or hybrid systems.
• It can be a minor sensor signal or a sign of a developing issue that affects fuel economy and emissions.
• Our factory-trained technicians use Toyota-specific scanners to identify the exact code and recommend repairs that protect long-term value.
• Choosing Nalley Toyota of Roswell often yields immediate and long-term savings versus independent shops, and warranty work must be done at a certified dealer.

How much does a check engine light diagnostic cost for a 2019 Toyota Highlander Hybrid?

• Diagnostic fees vary, but at Nalley Toyota of Roswell you receive transparent pricing and a thorough scan with Toyota factory tools.
• We commonly find sensor or ignition issues that are lower-cost to repair early; delaying can lead to expensive downstream parts like catalytic converters.
• Our dealership often costs less than independent shops when you factor in accurate diagnosis, genuine parts, and covered warranty work.
• Any repair covered by warranty must be completed at a certified dealer to retain coverage and maximize long-term savings.

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

• Start with securing the vehicle and checking for obvious issues: loose gas cap, audible misfire, or loss of power.
• Next step is a professional OBD-II scan to read codes — Nalley Toyota of Roswell uses Toyota-specific diagnostics for accurate results.
• Addressing the root cause at our dealership provides immediate savings by preventing escalation and protects warranty benefits long-term.
• If the vehicle is driving poorly or the light is flashing, stop driving and bring it to the dealership immediately.

How long does a check engine light service take?

• Standard diagnostic scans commonly take 30–60 minutes; complex faults or road tests may extend the visit.
• Repairs range from quick sensor swaps to multi-hour repairs; our service advisors give time estimates up front.
• Using Nalley Toyota of Roswell typically means faster, more accurate service from factory-trained techs and genuine Toyota parts.
• Warranty repairs must be completed at a certified dealership to keep coverage intact, a step that preserves long-term value and savings.