Frequently Asked Questions

How much does a check engine light diagnostic cost for a 2006 Toyota Highlander Hybrid?

• Costs vary by symptom, but a dealership diagnostic typically starts with a computerized scan and inspection; many issues are identified quickly.
• Our dealership often costs less than independent shops when you account for accurate diagnosis, OEM parts, and fewer repeat repairs — delivering immediate and long-term savings.
• Estimates for repairs depend on the code: simple fixes (loose gas cap, small EVAP leaks) are inexpensive, while catalytic or engine repairs are pricier.
• Any repairs covered under warranty must be performed at a certified dealership to retain coverage; our factory-trained technicians ensure warranty compliance.
• Contact Nalley Toyota of Roswell for a precise diagnostic quote and transparent estimate.

What does it mean when the check engine light comes on in a 2006 Toyota Highlander Hybrid?

• The light signals that the vehicle’s onboard diagnostics (OBD-II) detected an issue — from minor to serious — and stored a trouble code.
• Common causes include emissions system faults, sensor failures, misfires, or fuel/air mixture problems; the code pinpoints the system needing attention.
• Some conditions are urgent (persistent misfire) and can cause catalytic converter damage if ignored; others are minor and easy to fix.
• Our certified technicians use OEM-grade scanners and inspect related systems thoroughly to diagnose correctly the first time, reducing repeat visits and long-term costs.
• If your vehicle is under warranty, remember repairs covered by warranty must be completed at a certified dealership to maintain coverage.

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

• Start with simple checks: verify the gas cap is tight — a loose or damaged cap is a common trigger and an easy fix.
• Check basic fluids and look for obvious issues (disconnected hoses, corrosion at battery terminals, or recent fuel smell).
• If the light remains on, schedule a diagnostic at Nalley Toyota of Roswell so factory-trained techs can read codes with OEM equipment and avoid misdiagnosis.
• Prompt dealership inspection can prevent minor problems from becoming costly repairs and helps preserve any warranty coverage that requires certified service.
• A quick scan at the dealership gives a clear next step and an accurate cost estimate to compare before repair.

How long does a check engine light service take?

• Simple diagnostics and minor repairs (tightening a gas cap, clearing a code) can often be completed in under an hour.
• Comprehensive diagnostics, road testing, and multi-system inspections typically take a few hours to ensure an accurate fix and to document warranty needs.
• Complex repairs that require parts (oxygen sensors, catalytic converters, engine components) take longer depending on parts availability and repair scope.
• Choosing dealer service means factory-trained technicians and OEM parts — slightly more thorough work up-front that usually saves time and money over repeated independent-shop visits.
• We recommend scheduling a service appointment so we can confirm exact timing and get you back on the road quickly and correctly.

What is the most common reason for check engine light on a 2006 Toyota Highlander Hybrid?

• Common triggers include a loose gas cap, oxygen sensor failure, EVAP system leaks, or fuel/air mixture issues leading to codes like P0455, P0420, or P0171.
• Sensor wear (oxygen, MAF) and emissions-related faults are frequent on higher-mileage vehicles and are often caught early by diagnostics.
• Ignoring these warnings can lead to reduced fuel economy, failed emissions tests, or more expensive repairs such as catalytic converter replacement.
• Our service team at Nalley Toyota of Roswell diagnoses the root cause with OEM tools to prevent unnecessary part replacements and to keep long-term ownership costs low.
• Remember: warranty-covered repairs must be completed at a certified dealership to maintain protection and ensure proper parts and procedures.