Frequently Asked Questions

What is the most common reason for check engine light on a 2026 Toyota Highlander?

• Most frequent causes include a loose or damaged gas cap, faulty oxygen sensor, worn spark plugs, or emissions-related components.
• Ignoring the light can raise fuel consumption and lead to catalytic converter damage — increasing repair costs substantially.
• We often find that dealership diagnostics locate the true cause faster, saving immediate repair expense and long-term maintenance costs.
• Remember: warranty-covered repairs must be completed at a certified dealership to preserve coverage.

What does it mean when the check engine light comes on in a 2026 Toyota Highlander?

• The light signals the vehicle’s onboard diagnostics detected an issue — from emissions faults to engine or sensor irregularities.
• It can indicate anything from a simple emissions code to a more serious engine, transmission, or sensor problem requiring prompt attention.
• Our factory-trained technicians use OEM-level scanners to read codes and explain the issue, recommended repairs, and cost-effective options.
• Choosing Herb Chambers Toyota of Boston often costs less than independent shops in the short and long term thanks to precise diagnostics and lasting repairs.

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

• Start with basic checks: secure the gas cap, verify oil and coolant levels, and listen for unusual noises.
• If the light is steady, you can often drive cautiously to our service center; if it’s flashing, stop and have it inspected immediately.
• Bring your Highlander to a certified dealership so any warranty implications are protected — warranty repairs must be done at a certified facility.
• Schedule service online via our Service Scheduler for a timely diagnostic at Herb Chambers Toyota of Boston.

How much does a check engine light diagnostic cost for a 2026 Toyota Highlander?

• Diagnostic fees vary, but our dealership provides clear estimates and service specials; see current offers on our Service Specials page.
• Because our technicians identify root causes quickly, customers often save on immediate repair costs and avoid higher long-term expenses that come from misdiagnosis.
• We frequently cost less than independent shops while delivering factory-trained expertise and OEM parts for reliable results.
• Warranty-related diagnostics and repairs must be performed at a certified dealership to maintain coverage and ensure lasting value.

How long does a check engine light service take?

• Typical diagnostic appointments range from 30 minutes to 1.5 hours depending on the complexity of the code and required inspections.
• Simple fixes like tightening a gas cap or replacing a sensor can often be completed the same day; more involved repairs take longer based on parts and scope.
• We recommend scheduling through our Service Scheduler to minimize wait time and take advantage of service specials that reduce total cost.
• Completing service at our dealership often saves both time and money over the life of the vehicle thanks to accurate repairs and warranty protection.