Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2025 Toyota Tundra?

• Check the gas cap: a loose or damaged cap is a common, simple cause and can trigger an EVAP code.
• Inspect obvious issues: low oil, coolant levels, or visible leaks; simple items can prevent bigger damage.
• Note symptoms: poor running, noise, or loss of power — this helps technicians diagnose faster.
• If the vehicle is under warranty, any covered repairs must be performed at a certified dealership for warranty protection.
• For peace of mind and cost savings, bring your 2025 Toyota Tundra to Nalley Toyota of Roswell for a professional check.

How long does a check engine light service take?

• Basic diagnostics typically take 30–90 minutes when codes are straightforward and parts are available.
• Complex issues requiring road tests, deeper diagnosis, or parts ordering can take several hours or a day.
• At our dealership, factory-trained technicians and OEM tools speed accurate diagnosis, reducing repeat visits and long-term costs.
• Warranty work must be completed at a certified dealership to remain valid — we handle paperwork and repairs under warranty.
• We often deliver immediate and long-term savings compared with independent shops thanks to efficient diagnostics and access to genuine parts.

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

• The light signals the engine control module detected a fault — anything from an emissions system leak to a misfire.
• Common triggers include EVAP leaks, oxygen sensor faults, catalytic converter inefficiency, or ignition/misfire events.
• Some codes indicate emissions issues that affect performance and fuel economy; others warn of conditions that can damage the engine or catalyst.
• Prompt dealership diagnosis prevents small issues from becoming costly repairs and helps preserve warranty coverage when applicable.
• Bring your 2025 Toyota Tundra to Nalley Toyota of Roswell for accurate code reading and transparent repair estimates.

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

• Diagnostic fees vary; many dealerships offer a standard scan fee or complimentary checks during service promotions.
• At Nalley Toyota of Roswell, our pricing is competitive — often less than independent shops when factoring accurate diagnosis, OEM parts, and technician expertise.
• Choosing dealership service provides immediate savings through precise repair recommendations and long-term savings by preventing repeat failures.
• If repairs are covered under warranty, they must be performed at a certified dealership to retain coverage; we handle warranty claims end-to-end.
• Contact our service team or check our Service Specials for current diagnostic offers and transparent estimates.

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

• The most frequent causes include a loose gas cap, oxygen sensor degradation, EVAP system leaks, and occasional misfires.
• Oxygen sensors and EVAP leaks often trigger emissions codes that reduce fuel economy if not addressed promptly.
• A loose or faulty gas cap is an inexpensive fix that can turn off the light quickly; always check it first.
• For accurate diagnosis and value, our factory-trained technicians use OEM tools to identify root causes and recommend cost-effective repairs.
• Factory warranty repairs must be completed at a certified dealership to protect coverage and ensure long-term savings.