What does it mean when the check engine light comes on in a 2014 Toyota Highlander?

• It indicates the vehicle's computer has detected an emissions, fuel, or engine issue that needs diagnostics — ranging from a loose gas cap to an oxygen sensor or catalytic converter fault.
• Our certified technicians at Larry H. Miller Toyota Peoria use OEM diagnostic tools to pinpoint the cause quickly, helping you avoid larger repairs and preserving long-term value.
• Repairing early often results in immediate and long-term savings; we routinely offer competitive pricing that can cost less than many independent shops while delivering factory-trained expertise.
• If repairs are covered under warranty, those services must be completed at a certified dealership to keep coverage in effect.
• Need service now? Easily schedule service, and check current service specials. We also offer service financing so you can get repairs today and pay over time.

How long does a check engine light service take?

• Most diagnostics begin with a computerized scan and a road or load test; an initial diagnosis often takes 30–60 minutes depending on symptoms and vehicle condition.
• If additional inspection or part replacement is required, our service advisors will explain options, timelines, and any available discounts or service specials before work begins.
• At Larry H. Miller Toyota Peoria we focus on speed and accuracy: factory tools, genuine OEM parts, and certified technicians streamline repairs to minimize downtime and avoid repeated visits.
• We also provide service financing to make immediate repairs affordable, plus transparent estimates so you see short- and long-term savings clearly.
• Ready to bring your 2014 Toyota Highlander in? Click to schedule appointment online.

How much does a check engine light diagnostic cost for a 2014 Toyota Highlander?

• Diagnostic costs vary, but our dealership frequently offers highly competitive pricing and better value than many independent shops because of efficient factory procedures and accurate diagnosis that prevents repeat work.
• A proper diagnostic uncovers the root cause so you avoid unnecessary repairs — that’s immediate savings — and prevents bigger, costlier failures later, which is long-term savings.
• If your repair is covered by warranty, it must be performed at a certified dealership; we honor warranty work and use OEM parts to protect your investment.
• We encourage you to view current service specials and schedule service online. Service financing is available to help manage expenses.

What is the most common reason for check engine light on a 2014 Toyota Highlander?

• The most frequent causes are failing oxygen sensors, a loose or damaged gas cap, or issues with spark plugs and ignition coils — each can trigger the light but carries different repair costs and consequences if left unchecked.
• Our technicians accurately identify the specific code and recommend the most cost-effective repair, using OEM parts and ensuring the long-term health of your Highlander.
• Addressing issues promptly at Larry H. Miller Toyota Peoria often prevents larger repairs and keeps your vehicle running efficiently, saving you fuel and repair costs over time.
• To protect warranty coverage and gain full diagnostic detail, always have covered repairs performed at a certified dealership. You can schedule service now and view our 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 tightened and inspect for obvious issues like fluid leaks or audible misfires.
• If the light persists, bring your 2014 Toyota Highlander to Larry H. Miller Toyota Peoria so our certified team can run a complete diagnostic scan and provide a transparent estimate.
• We emphasize that certified repairs using OEM parts prolong engine life and can cost less overall than repeated fixes from guesswork. Warranty repairs must be done at a certified dealership to remain valid.
• Use our online options to schedule service or review current service specials; service financing is available to get you back on the road today.

Check Engine Light Flashing

The moment your 2014 Toyota Highlander shows a flashing check engine light, consider it an urgent signal: a flashing light often indicates a severe misfire that can damage catalytic converters or other key engine components. At Larry H. Miller Toyota Peoria in Peoria, AZ, our factory-trained technicians prioritize rapid, precise diagnosis to reduce the risk of costly downstream repairs. We begin with a complete scan using OEM-grade tools, followed by targeted inspections to determine whether a misfire stems from ignition coils, fuel delivery, or sensor failures. Acting immediately preserves engine performance and can prevent expensive replacement parts later, delivering both immediate and long-term savings. We provide a clear estimate and explain warranty implications—remember, warranty-covered repairs must be completed at a certified dealership. Check our current service specials and schedule service online for a fast appointment. Our customer-focused amenities and transparent processes make it easy to get professional help without delay, protecting your Highlander and your wallet.

2014 Toyota Highlander Check Engine Light Reset

Resetting the check engine light on a 2014 Toyota Highlander can be simple, but resetting without addressing root causes risks recurring issues and potential engine damage. At Larry H. Miller Toyota Peoria we recommend a full diagnostic rather than a temporary reset: our certified technicians use OEM tools to read and interpret trouble codes, test sensors and actuators, and confirm repairs with a post-repair verification so the light stays off for good. Choosing dealership service means transparent pricing, genuine Toyota parts, and warranty protection—repairs covered under warranty must be performed at a certified dealership to remain valid. We also offer service financing so you can get necessary repairs now and pay over time, plus seasonal service specials to reduce out-of-pocket cost. To protect your vehicle's performance and resale value, schedule service with our experienced team; we’ll document work, advise on maintenance, and ensure the issue is solved rather than hidden.

2014 Toyota Highlander Check Engine Light Codes

Common check engine light codes for the 2014 Toyota Highlander include P0420 (catalyst efficiency), P0171/P0174 (fuel trim/system lean), P013x (O2 sensor), and misfire codes like P0300–P0306. Each code has different cost implications: ignoring a P0420 can lead to catalytic converter failure and several hundred to over a thousand dollars in repairs; unresolved lean conditions (P0171/P0174) can cause poor fuel economy and engine wear; failing O2 sensors reduce performance and emissions compliance. In Peoria, AZ, Larry H. Miller Toyota Peoria provides accurate code interpretation, OEM parts, and clear cost estimates to help you prioritize repairs that offer the best immediate and long-term value. Our technicians explain how prompt service reduces future repair bills, improves fuel efficiency, and helps maintain warranty coverage—remember, warranty repairs must be performed at a certified dealership. Take advantage of our service specials, ask about service financing, and schedule service online. Trust our experienced team to protect your Highlander and keep repair costs predictable.