Frequently Asked Questions

What is the first thing to check when the check engine light comes on in a 2025 Toyota 4Runner?

• Check simple items first: a loose or damaged gas cap can trigger the light and is quick to inspect and fix.
• Look for obvious signs: unusual odors, smoke, or fluid leaks under the vehicle that need immediate attention.
• Note vehicle behavior: reduced power, stalling, or strange noises—document symptoms to help technicians diagnose faster.
• Bring the vehicle to Nalley Toyota Union City for factory-level inspection; warranty-covered repairs must be done at a certified dealership.
• We often cost less than independent shops and deliver immediate and long-term savings through accurate diagnostics and genuine parts.

What does it mean when the check engine light comes on in a 2025 Toyota 4Runner?

• The light indicates the vehicle’s onboard computer has detected an issue ranging from minor to serious; it stores diagnostic trouble codes.
• Causes vary: emissions system faults, sensor failures, fuel system issues, or catalytic converter problems.
• Immediate scanning at Nalley Toyota Union City pinpoints exact codes so we can recommend the correct repair and avoid unnecessary work.
• Warranty-covered items must be repaired at a certified dealership to maintain coverage and ensure genuine Toyota parts are used.
• Choosing our service center often saves you money now and over time thanks to accurate diagnostics, factory-trained technicians, and service transparency.

How much does a check engine light diagnostic cost for a 2025 Toyota 4Runner?

• Diagnostic fees vary but at Nalley Toyota Union City we provide transparent pricing and accurate diagnostics to avoid repeat visits.
• We often cost less than independent shops because our factory diagnostics reduce guesswork and unnecessary parts replacement.
• If repairs are covered under warranty, they must be performed at a certified dealership to remain valid—our team handles warranty claims directly.
• Choosing dealership service delivers immediate savings through precise repair plans and long-term savings via genuine parts and factory-trained technicians.
• Contact our service department for current diagnostic specials and appointment availability at /specials/service.htm.

How long does a check engine light service take?

• Simple diagnostics can take 30–60 minutes; more complex issues requiring test drives or parts inspection may take several hours.
• At Nalley Toyota Union City we prioritize efficient scheduling, clear time estimates, and updates so you know what to expect.
• If repairs are required and covered by warranty, those must be completed at a certified dealership to preserve coverage and quality.
• Our factory-trained technicians use OEM tools to reduce repair time and avoid repeat visits, saving you time and money in the long run.
• Request an appointment through our service specials page to take advantage of current offers and faster turnaround times.

What is the most common reason for check engine light on a 2025 Toyota 4Runner?

• The most frequent cause is an emissions-related fault, often a failing oxygen sensor, catalytic converter issue, or evaporative system leak.
• Other common triggers include faulty spark plugs, mass airflow sensors, or minor fuel system issues that are straightforward to diagnose.
• Early diagnosis at Nalley Toyota Union City prevents small problems from becoming expensive repairs and preserves fuel efficiency.
• Warranty repairs must be completed at a certified dealership; our team manages warranty work and uses genuine Toyota parts to ensure reliability.
• We often cost less than independent shops by delivering precise diagnostics and correct repairs the first time, producing immediate and long-term savings.