2013 Toyota Highlander Check Engine Light in Murray, UT

It means the OBD-II system detected a fault and stored a diagnostic trouble code (DTC) that identifies the affected system.

Your 2013 Toyota Highlander monitors engine, fuel, and emissions systems; the light turns on when readings fall outside expected values. A loose gas cap can trigger it, but so can issues like misfires or catalyst efficiency. Our Toyota-specific scan tools read live data, freeze-frame snapshots, and manufacturer codes for accurate direction. You can schedule service in Murray for a same-visit evaluation.

• Light on = a DTC is stored; we retrieve it and test the cause
• Steady light often indicates non-urgent faults; flashing signals misfire risk
• Fixes range from gas cap replacement to sensor or ignition repairs

Common causes include EVAP leaks (loose gas cap), O2 sensor faults, MAF sensor issues, catalytic converter efficiency codes, and cylinder misfires.

For Highlander’s 3.5L V6, age and mileage can lead to sensor degradation or ignition wear that trips the light. Utah’s temperature swings can also stress the EVAP system. We confirm root cause with isolation tests beyond a basic code read, then provide a written estimate before any repair. Check our current service specials and schedule an appointment online.

• EVAP leaks: cap seal or small hose cracks
• O2/AFR sensors: aging elements skew fuel trim
• Misfires: worn plugs/coils can damage the catalytic converter if ignored

If the light is steady, drive cautiously to service; if it’s flashing, stop driving—flashing indicates a severe misfire that can overheat and damage the catalytic converter.

A steady light usually signals an emissions or sensor concern; performance may be reduced but immediate damage is unlikely. A flashing light means raw fuel may reach the catalyst, risking an expensive repair. If safe, head to Larry H. Miller Toyota Murray in Murray for priority diagnostics or schedule service now.

• Flashing = tow or stop operating to prevent catalyst damage
• Steady = minimize heavy loads or high speeds en route to service
• We provide a written estimate before any repair work

A parts store reads generic codes; our dealership performs full diagnosis using Toyota factory scan tools, technical service bulletins, and guided tests to find the actual cause.

One code can have multiple root causes—replacing parts based on a generic read often wastes money. We analyze freeze-frame data, run bidirectional tests, check Toyota-specific data PIDs, and verify the fault before recommending repairs. You’ll leave with a verified diagnosis and clear next steps. Book your visit via our schedule appointment page.

• Factory scan access to Toyota proprietary data and tests
• Isolation testing confirms cause before parts are replaced
• Written estimate and prioritized repair plan

No—resetting clears codes and sets OBD-II monitors to “not ready,” which will typically fail Utah emissions until drive cycles complete and the underlying fault is fixed.

Inspection systems check for stored codes and readiness monitors. A quick reset may turn the light off temporarily, but the test reads “not ready” and can fail. We repair the cause, verify monitors, and help you complete necessary drive cycles. See current service specials or schedule service in Murray.

• Readiness must show “ready” for key systems
• Drive cycles vary by fault; we advise exact steps
• Fix root cause to prevent the light from returning

Confirm the gas cap is tight, reduce heavy driving, and book a diagnostic at Larry H. Miller Toyota Murray for a same-visit code read and plan.

Temperature swings along the Wasatch Front can trigger EVAP-related alerts, but other faults may be present. Tightening the cap is a quick first step; if the light persists or flashes, get professional diagnosis. Use our online schedule service tool and arrive at 5650 South State Street, Murray, UT 84107.

• Check fuel cap click-tight after refueling
• Avoid towing or high RPM if the light is on
• Seek immediate help for a flashing light or rough running

Our diagnostic process for your 2013 Toyota Highlander is designed to pinpoint the cause, not just read a code. First, we perform an initial OBD-II scan and capture freeze-frame data to see exactly when and how the fault occurred. Next, we review live data streams and run guided isolation tests—such as smoke testing for EVAP leaks or misfire counters for ignition faults—to confirm the failure. If needed, we check Toyota technical service bulletins for known patterns. You receive a written estimate before any repair, so you can decide the next step with confidence. Ready to get answers? Use our online portal to schedule service today.

LHM Toyota Murray serves the Salt Lake Valley and Greater Salt Lake City metro area—including Murray, Salt Lake City, Sandy, West Jordan, South Jordan, Millcreek, Holladay, and Taylorsville—with factory-authorized diagnostics for the 2013 Toyota Highlander. Our Toyota scan tools and data access go beyond generic readers, enabling bidirectional tests, OEM data PIDs, and precise isolation. Local climate matters: cold starts in winter can surface fuel-trim or misfire codes, while rapid temperature swings often reveal EVAP leaks. We verify causes before recommending parts, then provide a clear estimate. Find us at 5650 South State Street, Murray, UT 84107—call or schedule an appointment online for directions and availability.

On a 2013 Toyota Highlander, frequent codes include EVAP system leaks (small/large leak), oxygen/air-fuel sensor performance, mass air flow (MAF) correlation, catalyst efficiency below threshold, and cylinder misfire (e.g., P0300–P0306). EVAP leaks often trace to a loose or worn gas cap; ignoring them can keep the light on and block emissions approval. O2/AFR and MAF issues skew fuel control, harming MPG and causing drivability concerns over time. Misfires left unfixed can overheat and damage the catalytic converter—an expensive component. Bring your 2013 Toyota Highlander to Larry H. Miller Toyota Murray in Murray for an accurate diagnosis — schedule service.