Frequently Asked Questions

How long does a check engine light service take?

• Most diagnostics for a 2025 Toyota 4Runner begin with an OBD-II scan and a visual inspection and typically take 30–90 minutes depending on symptoms.
• Simple resets or quick repairs (loose gas cap, swapped sensor) can often be completed the same day; more involved repairs may require parts and additional shop time.
• At Nalley Toyota Stonecrest our factory-trained technicians prioritize accurate diagnosis to avoid repeat visits, reducing long-term downtime and cost.
• We often provide faster turnaround and lower total ownership cost than independent shops because our diagnostics are precise and warranty-covered repairs are performed in-house.

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

• A check engine light indicates the vehicle’s computer detected a fault — anything from a loose gas cap to an engine misfire or emissions issue.
• Codes vary in severity: some are informational, others indicate immediate risk to performance or emissions equipment.
• Ignoring codes can cause bigger repairs later; bringing your 2025 Toyota 4Runner to our certified service center protects warranty coverage and saves money long-term.
• Nalley Toyota Stonecrest uses OEM parts and factory diagnostics, which often reduces overall cost versus repeated independent shop attempts and preserves warranty eligibility.

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

• Diagnostic costs vary with complexity; a basic scan may range from about $90–$160, while extended diagnostics that require road testing or component testing can cost more.
• At Nalley Toyota Stonecrest diagnostics are transparent — we apply diagnostic fees to approved repairs whenever possible, minimizing immediate out-of-pocket cost.
• Choosing our dealership delivers immediate and long-term savings: accurate diagnosis prevents unnecessary parts replacement and maintains warranty coverage for eligible repairs performed at a certified dealer.
• If a repair is covered under warranty, it must be completed at a certified dealership like ours to ensure full coverage and proper record keeping.

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

• Common causes include a loose or damaged gas cap, faulty oxygen sensor, mass air flow issues, or ignition misfires — each triggers specific diagnostic trouble codes.
• Many issues start small but can escalate; for example, a misfire left unchecked can damage the catalytic converter, raising repair costs significantly.
• Our technicians use Toyota-specific tools to pinpoint root causes quickly, often costing less overall than an independent shop that may perform trial-and-error repairs.
• Repairs covered by warranty must be carried out at a certified dealership to protect your long-term coverage and ensure OEM-quality parts and labor.

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

• Start with simple checks: confirm fuel cap is tightened, review the instrument panel for additional alerts, and note any performance changes (loss of power, rough idle).
• If the vehicle drives normally, schedule a prompt diagnostic — codes can indicate progressive damage even when symptoms are mild.
• If the light is flashing, stop driving and have the vehicle towed to Nalley Toyota Stonecrest; flashing often signals severe misfire and risk to the catalytic converter.
• Bringing your 2025 Toyota 4Runner to our certified service center ensures warranty protection, OEM parts, and factory-trained technicians who reduce long-term repair costs.