Frequently Asked Questions

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

• Check the gas cap: a loose or damaged cap is a common trigger and simple to fix.
• Note any driveability changes — stuttering, loss of power, or unusual noises — before visiting service.
• Avoid DIY resets as a permanent solution; clearing codes without repairs can mask underlying damage.
• Bring your 2025 Toyota GR86 to Nalley Toyota of Roswell for a prompt OEM diagnostic to protect warranty and long-term value.

How much does a check engine light diagnostic cost for a 2025 Toyota GR86?

• We provide a clear diagnostic fee and a transparent estimate before any repairs are performed.
• Nalley Toyota of Roswell often costs less than independent shops by avoiding unnecessary parts swaps and targeting the true fault.
• Immediate savings come from accurate diagnostics; long-term savings from using Genuine Toyota parts and calibrated repairs that prevent repeat failures.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and documented service history.

What does it mean when the check engine light comes on in a 2025 Toyota GR86?

• The light signals a fault detected by the engine control system — anything from a minor sensor fault to an active misfire.
• Codes range from emis­sions and fuel-trim issues to ignition or fuel system faults; severity varies by code and symptoms.
• Bring the vehicle in for an OEM scan so factory-trained technicians can read freeze-frame data and recommend the correct repair.
• Addressing issues early at Nalley Toyota of Roswell reduces repair costs and maintains factory warranty eligibility when required repairs are completed here.

How long does a check engine light service take?

• Initial diagnosis typically takes about one to two hours, depending on live-data testing and road checks.
• Simple fixes — like replacing a sensor or tightening a gas cap — can often be completed the same day.
• Complex repairs (fuel system, catalytic converter, or intermittent misfires) may require additional testing and parts ordering.
• Our factory-trained team works efficiently with OEM tools to minimize downtime and deliver documented, warranty-compliant repairs.

What is the most common reason for check engine light on a 2025 Toyota GR86?

• Common causes include ignition misfires (coils or plugs), oxygen or air-fuel sensors, and small evap system leaks.
• Misfires are particularly impactful in a performance coupe like the GR86 and should be diagnosed quickly to avoid converter damage.
• Accurate diagnosis at Nalley Toyota of Roswell prevents wasted parts replacement and often results in lower total cost than independent shops.
• If the repair is warranty-covered, having the work done at a certified dealership is required to maintain coverage.