Frequently Asked Questions

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

• Check for obvious issues first: a loose or missing gas cap is a common cause and easy to fix.
• Inspect dashboard messages—some systems will show follow-up indicators (e.g., traction, emissions) that narrow the cause.
• Note the vehicle’s behavior: rough idle, loss of power, or stalling helps our techs prioritize diagnostics.
• Bring your 2025 Toyota Sequoia to Nalley Toyota Union City for a full scan; repairs covered under warranty must be completed at a certified dealership.
• Choosing our dealership often costs less than independent shops, delivering immediate savings and better long-term value with factory-trained service.

How long does a check engine light service take?

• Basic diagnostics typically take 30–60 minutes for a full scan and initial code review.
• Simple repairs (like replacing a gas cap, oxygen sensor, or clearing a code after repair) can be completed the same day.
• Complex repairs that require parts or in-depth troubleshooting may take a day or more; we provide clear timelines and updates.
• Warranty repairs must be done at a certified dealership; that ensures genuine parts and documented service for long-term savings.
• We often cost less than independent shops while delivering factory-trained expertise and genuine Toyota parts.

How much does a check engine light diagnostic cost for a 2025 Toyota Sequoia?

• Diagnostic scan fees are competitive; exact pricing depends on inspection depth and any required testing.
• If repairs follow, we apply transparent labor and parts estimates; dealership service often results in lower total cost over time than independent shops.
• Many diagnostics are complimentary with certain service promotions—check our Service Specials for current offers.
• Repairs covered under warranty must be performed at a certified dealership to keep coverage valid and maximize long-term savings.
• Contact Nalley Toyota Union City or book online to receive a clear diagnostic quote and available specials.

What does it mean when the check engine light comes on in a 2025 Toyota Sequoia?

• It indicates the engine management or emissions system detected a fault; codes stored in the vehicle point to the subsystem affected.
• Causes range from minor (loose gas cap) to serious (ignition misfire or catalytic converter issues).
• Immediate diagnosis prevents escalation; unresolved faults can increase fuel use, emissions, or engine damage.
• Repairs performed at our certified dealership protect any warranty coverage and often save you money both now and later.
• Our technicians use Toyota-specific tools to pinpoint the issue and recommend the most cost-effective repair path.

What is the most common reason for check engine light on a 2025 Toyota Sequoia?

• The most frequent causes include faulty oxygen sensors, loose gas caps, and ignition misfires.
• Emissions-related sensors like the O2 sensor or mass air flow sensor commonly trigger a light.
• Addressing these promptly at Nalley Toyota Union City reduces fuel waste and prevents larger component failures.
• Warranty-covered diagnostics and repairs must be completed at a certified dealership to preserve coverage and long-term value.
• We often deliver lower overall repair costs than independent shops thanks to efficient diagnostics and genuine Toyota parts.