Engine Light & Diagnostic FAQs — 2024 Toyota 4Runner

What does it mean when the check engine light comes on in a 2024 Toyota 4Runner?

• It signals the vehicle’s onboard diagnostics detected an issue — anything from a loose gas cap to an emissions, sensor, or engine performance problem.
• At Larry H. Miller Toyota Peoria, our certified technicians read codes with OEM-grade tools to identify the root cause quickly and accurately.
• Choosing our dealership often costs less than independent shops in the long run thanks to accurate diagnostics, genuine parts, and service financing options so you can get repairs now and pay later.
• Warranty repairs must be performed at a certified dealership to remain valid — we’ll verify coverage and recommend the correct fix.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes; most common fixes are completed the same day.
• If parts or deeper repairs are required, your service advisor at Larry H. Miller Toyota Peoria will explain timing, costs, and benefits of using OEM parts for durability.
• You can schedule service online for a convenient time; we deliver fast turnarounds, comfortable waiting areas, and clear estimates so you know what to expect.

How much does a check engine light diagnostic cost for a 2024 Toyota 4Runner?

• Diagnostics at our dealership are competitively priced and focus on long-term value — pinpointing the issue prevents repeated repairs and hidden costs.
• We often cost less than independent shops when you consider accurate diagnosis, OEM parts, and warranty protection; immediate savings and reduced lifetime maintenance expenses are common benefits.
• Ask our service team about current service specials and available service financing to make repairs affordable today.

What is the most common reason for check engine light on a 2024 Toyota 4Runner?

• Common causes include faulty oxygen sensors, loose/faulty gas caps, mass air flow sensor issues, and catalytic converter concerns.
• Timely dealership diagnostics reduce the risk of costly downstream damage and maintain towing or cargo capability for your 4Runner.
• All recommended repairs are backed by our certified technicians and OEM parts to protect vehicle longevity and your resale value.

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

• Check for an obvious loose or missing gas cap; tighten it and monitor the light. If it persists, bring the vehicle in for a full scan.
• If the light is flashing, stop driving and contact us immediately — this often indicates a serious misfire that can damage the catalytic converter.
• To book an inspection, schedule service online; our advisors will explain options and any available service specials.

2024 Toyota 4Runner Check Engine Light Reset

The check engine light reset process for a 2024 Toyota 4Runner starts with a complete diagnostic scan to identify stored trouble codes and pending faults. At Larry H. Miller Toyota Peoria in Peoria, AZ, our technicians use OEM diagnostic tools to retrieve and interpret codes safely — a simple reset without repair can hide an active problem and lead to costly failures. After diagnosing, we explain the recommended repair, provide transparent pricing, and use genuine Toyota parts to restore system integrity. Resets performed here are accompanied by verification testing to ensure the underlying issue is fixed, protecting emissions systems and fuel economy. We also honor warranty requirements and make it easy to schedule service online. Take advantage of our service specials and service financing so you can address codes now and avoid larger bills later.

2024 Toyota 4Runner Check Engine Light Codes

Common diagnostic codes for a 2024 Toyota 4Runner include P0420 (catalyst system efficiency), P0135 (O2 sensor heater circuit), P0171/P0174 (fuel trim lean conditions), and misfire codes like P0300. Each code has cost implications: ignoring a P0420 can lead to expensive catalytic converter replacement; leaving a misfire unresolved risks major engine damage and higher towing or repair bills later. At Larry H. Miller Toyota Peoria, our team explains the cost-to-benefit of timely repairs and offers OEM parts and factory-trained technicians to keep your 4Runner running reliably. We provide clear estimates, price comparisons that emphasize long-term savings, and options to use service financing. For transparency and convenience, view current offers or service specials, then schedule appointment with our service center in Peoria, AZ.

Check Engine Light Flashing

A flashing check engine light on a 2024 Toyota 4Runner typically signals a severe condition such as a misfire that can allow unburned fuel into the exhaust and damage the catalytic converter. If you see a flashing light, reduce speed, avoid heavy loads or towing, and contact Larry H. Miller Toyota Peoria immediately. Our certified technicians prioritize safety and fast diagnosis — we’ll perform a focused scan, identify misfire causes (ignition, fuel delivery, or mechanical issues), and recommend OEM repairs. We offer service financing, clear estimates, and often have same-day options when parts are in stock. Check our service specials for current discounts and schedule service online to protect your 4Runner and avoid costly catalytic converter or engine repairs. Call us or book online and let our Peoria team get you back on the road confidently.