Frequently Asked Questions

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

• Loose or damaged gas cap is the simplest and most frequent cause — it can trigger an emissions code without other symptoms.
• Faulty oxygen sensor or mass airflow sensor can cause poor fuel economy and engine light illumination.
• Engine misfires (spark plugs, ignition coils, or fuel delivery) are common and can escalate to catalytic converter damage if ignored.
• EVAP system leaks (fuel vapor line or charcoal canister) often show up as codes; dealership diagnostics find exact leak points.
• Nalley Toyota of Roswell uses factory-grade tools to diagnose root causes quickly, often costing less than independent shops while preserving warranty and long-term savings.

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

• It indicates the vehicle’s onboard computer detected an emissions, engine, or drivetrain irregularity and stored a diagnostic trouble code.
• Severity varies: steady light means scheduled attention; flashing light signals an urgent issue like active misfire that can damage components.
• A professional scan at a certified dealership reveals the exact code, needed repairs, and whether warranty coverage applies.
• Having repairs done at Nalley Toyota of Roswell ensures factory-trained technicians perform necessary work; warranty-covered repairs must be completed at a certified dealership.

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

• Confirm the gas cap is tight and undamaged — a quick fix that resolves many emissions codes.
• Note any new noises, loss of power, or dashboard alerts; a flashing light or drivability issues require immediate attention.
• Avoid repeatedly resetting the light yourself — codes help technicians identify intermittent or persistent faults.
• Schedule a diagnostic with Nalley Toyota of Roswell so our certified team can provide accurate repair estimates and protect warranty coverage.

How long does a check engine light service take?

• Initial diagnostic scan and code analysis typically take 30–60 minutes, depending on symptoms and system checks required.
• Minor repairs like replacing a gas cap or sensor are often completed the same day (1–3 hours).
• Complex repairs — misfire diagnosis, fuel system, or catalytic converter replacement — can take several hours to a full day.
• Nalley Toyota of Roswell prioritizes efficient, accurate repairs by factory-trained technicians, reducing rework and providing immediate and long-term savings compared with repeat visits elsewhere.

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

• Diagnostic prices vary by location; typical dealer diagnostic fees often fall within a competitive local range while delivering more accurate factory-level scanning.
• At Nalley Toyota of Roswell you get thorough diagnostics by certified technicians using Toyota-grade equipment — this can cost less in the long run by preventing misdiagnosis and repeat repairs.
• Any repairs covered under warranty must be performed at a certified dealership to maintain coverage and ensure proper parts and procedures are used.
• Ask about current service specials and transparent estimates so you understand immediate costs and long-term savings.