Frequently Asked Questions

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

• Verify the gas cap is tight and undamaged — a loose cap is a common, simple cause.
• Check basic fluids (oil and coolant) and dashboard warnings that accompany the light.
• Note vehicle behavior: rough idle, reduced power, or strange noises to report to technicians.
• If driving symptoms are severe, stop driving and have the vehicle towed to a certified dealership.
• Remember: repairs covered under warranty must be performed at a certified dealership to preserve coverage.

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

• It indicates the vehicle’s onboard diagnostics detected a fault in emissions, engine, or drivetrain systems.
• Faults range from minor (loose gas cap, sensor drift) to serious (misfire, catalytic damage).
• Early diagnostics at our dealership minimizes repair complexity and long-term cost escalation.
• Our factory-trained technicians use Toyota-grade tools to identify root causes and protect warranty coverage.
• For warranty-covered repairs, work must be done at a certified dealership to ensure full protection.

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

• Diagnostic fees vary by issue, but our dealership provides transparent pricing and reliable OEM diagnostics.
• We often cost less than independent shops because our accurate diagnosis prevents repeat repairs and hidden follow-up expenses.
• Immediate savings include correct repairs the first time; long-term savings come from preserving parts and avoiding escalation.
• When warranty applies, covered repairs must be performed at a certified dealership to maintain coverage and avoid out-of-pocket surprises.
• Ask our service advisors for exact diagnostic pricing and available service specials at Nalley Toyota of Roswell.

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

• Common causes include oxygen sensor faults, EVAP system leaks (loose gas cap), and occasional misfires.
• Many issues start small but can affect fuel economy and emissions if left unresolved.
• Prompt dealer diagnosis prevents small faults from turning into expensive repairs like catalytic converter replacement.
• Our technicians use OEM scan tools to pinpoint the exact cause, saving time and money compared with trial-and-error fixes.
• Warranty-covered items must be repaired at a certified dealership to ensure valid coverage and factory-standard service.

How long does a check engine light service take?

• Basic diagnostic scans often take 30–60 minutes; full diagnosis and recommended repairs take longer depending on findings.
• If parts are needed, wait time depends on part availability; we stock many OEM components for faster turnaround.
• Our certified shop offers efficient workflows and factory-trained techs to reduce total service time while ensuring thorough repairs.
• Choosing dealer service provides immediate and long-term savings through accurate repairs and preserved warranty coverage.
• We’ll give a clear time estimate after the initial scan and prior to any repairs.