Frequently Asked Questions

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

• Diagnostics typically range from a complimentary scan (with many service visits) up to $80–$150 for a detailed dealer diagnostic; prices vary with scope.
• Nalley Toyota of Roswell often costs less than independent shops while providing factory-trained technicians, OEM tools and more thorough testing—delivering immediate and long-term savings.
• Accurate diagnostics prevent unnecessary repairs; early detection reduces parts and labor costs over time and helps avoid expensive failures like catalytic converter replacement.
• Repairs covered under warranty must be performed at a certified dealership to preserve coverage—our certified team handles warranty work directly and efficiently.

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

• It signals the vehicle’s onboard computer detected an issue with emissions, engine, or powertrain systems that needs assessment.
• Causes range from minor (loose gas cap or oxygen sensor) to serious (misfire or catalytic converter trouble); a scan tool reveals stored trouble codes.
• Bringing your vehicle to our dealership ensures OEM-level diagnostics, factory procedures and parts, protecting long-term value and warranty eligibility.
• Addressing codes early often reduces fuel use, restores performance and prevents costly downstream damage—immediate service at Nalley Toyota of Roswell saves money over time.

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

• Confirm the gas cap is tight and properly seated—this simple step resolves many emissions-related codes and is quick to inspect.
• Note any symptoms (loss of power, rough idle, stalling, odd noises) to share with our technicians; symptoms help prioritize safety concerns.
• A diagnostic scan is the next step; our certified technicians use OEM tools to read codes and recommend the correct repair path.
• If a repair is warranty-covered it must be done at a certified dealership to retain coverage—our service team handles those repairs promptly and correctly.

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

• Common causes include a loose or damaged gas cap, oxygen sensor faults, ignition coil or spark plug issues, and evap system leaks.
• Many of these are inexpensive to fix when caught early; ignoring them can escalate repair costs and increase emissions or fuel consumption.
• Nalley Toyota of Roswell provides accurate diagnosis with factory tools and access to genuine Toyota parts—this reduces repeat visits and long-term expense.
• Warranty work and manufacturer-covered repairs must be completed at a certified dealership to remain valid—our service department ensures proper documentation and care.

How long does a check engine light service take?

• A basic code scan and initial inspection usually take 30–60 minutes, depending on shop load and symptom complexity.
• If further testing or road diagnostics are required, total time may extend to a few hours; our team provides clear timelines and estimates before work begins.
• Choosing our dealership often shortens overall repair time thanks to OEM parts availability, factory-trained technicians and streamlined warranty handling.
• Fast, accurate service reduces the chance of repeat repairs—saving time and money both immediately and in the long run.