Frequently Asked Questions

What does it mean when the check engine light comes on in a 2021 Toyota Land Cruiser?

• It signals that one of the vehicle’s emission, fuel, ignition, or sensor systems has reported an issue—anything from a loose gas cap to a failing oxygen sensor. Left unaddressed, small faults can turn into costly repairs that reduce fuel economy and drivetrain life.
• At Larry H. Miller Toyota Peoria we diagnose the cause quickly using OEM-level scanners and factory-trained technicians so you save both time and money now and over the long term.
• Many repairs are covered by warranty; warranty repairs must be completed at a certified dealership to remain valid. We’ll explain coverage, available options, and immediate vs. long-term savings.
• When you’re ready, you can schedule service online or check our service specials for current offers. We also provide service financing to get repairs done now and pay later.

How long does a check engine light service take?

• Typical diagnostics take 30–90 minutes, depending on symptoms and whether a road test or additional system tests are required; straightforward code reads are often completed the same day.
• Larry H. Miller Toyota Peoria focuses on efficient turnarounds—clear communication, appointment reminders, and streamlined parts availability help get you back on the road faster.
• An accurate diagnosis upfront reduces repeat visits and unnecessary repairs, producing immediate savings and preserving the longevity of your 2021 Toyota Land Cruiser.
• To confirm availability and estimated completion time, schedule service and view our current service specials.

How much does a check engine light diagnostic cost for a 2021 Toyota Land Cruiser?

• Diagnostics at Larry H. Miller Toyota Peoria are competitively priced and commonly offer better immediate and long-term value than independent shops because of our access to OEM tools, factory parts, and certified technicians.
• Typical diagnostic pricing varies by the complexity of the fault; we’ll provide a clear estimate up front and point out how timely repairs prevent expensive downstream failures.
• We honor service financing options so you can repair now and pay later, protecting your vehicle and budget. All warranty-covered work must be performed at a certified dealership to keep coverage intact.
• Book a time to inspect the vehicle and receive a transparent estimate—schedule service and check our latest service specials.

What is the most common reason for check engine light on a 2021 Toyota Land Cruiser?

• Common causes include a loose or faulty gas cap, oxygen or mass airflow sensor issues, ignition misfires, or emission control faults. Fuel and ignition problems are especially important to address quickly for a V8 like the 5.7L in the 2021 Toyota Land Cruiser.
• Our technicians in Peoria, AZ, use Toyota-grade diagnostics to pinpoint root causes and recommend OEM repairs that maximize performance and resale value.
• Prompt dealership service often saves money immediately (fewer tow-ins, better fuel economy) and long term (avoids catalytic converter or engine damage).
• Use our online tool to schedule service and view current service specials.

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

• Start with simple checks: ensure the gas cap is properly tightened, review recent fueling history, and note any performance changes like rough idle or loss of power.
• If the light remains, let Larry H. Miller Toyota Peoria perform a full scan with OEM equipment so you get an accurate diagnosis the first time—this reduces unnecessary repairs and delivers better savings.
• All warranty-related repairs must be completed at a certified dealership to maintain coverage; our team will review warranty status and financing options to help you decide.
• To get an expert inspection, schedule service now and browse our service specials.