Frequently Asked Questions

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–60 minutes to read codes, verify symptoms, and identify needed repairs.
• Minor repairs or resets can often be completed the same day; more involved repairs may require scheduling and parts, extending service to a day or two.
• Nalley Toyota of Roswell aims for efficient turnaround using factory tools and streamlined parts access to minimize downtime.
• When covered by warranty, repairs must be done at a certified dealership to preserve coverage and ensure long-term savings.

What does it mean when the check engine light comes on in a 2015 Toyota Prius Plug-in?

• It indicates the vehicle’s onboard computer detected an emissions, engine, or hybrid system fault—ranging from loose gas cap to sensor or catalytic issues.
• Some faults are minor; others can affect fuel economy, performance, or hybrid system operation if left unaddressed.
• Nalley Toyota of Roswell uses OEM diagnostic procedures and genuine parts to restore performance and protect resale value.
• Choosing our dealership often costs less than independent shops when you factor in accurate diagnosis, warranty protection, and long-term repair durability.

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

• Start with simple items: ensure the fuel cap is properly tightened, as a loose cap commonly triggers a code on the 2015 Toyota Prius Plug-in.
• If the cap is secure, drive to a certified service center for a diagnostic scan rather than guessing repairs—proper diagnosis avoids unnecessary expense.
• Our factory-trained technicians inspect codes, live sensor data, and evap system integrity to pinpoint causes quickly and accurately.
• When warranty applies, repairs must be performed at a certified dealership to maintain coverage and deliver guaranteed savings over time.

How much does a check engine light diagnostic cost for a 2015 Toyota Prius Plug-in?

• Diagnostic fees vary by the scope of testing; many basic scans start around $80–$150, depending on the tests required.
• If the issue is covered under warranty, the diagnostic and covered repairs are completed at no charge under the terms of the warranty—at a certified dealership.
• Nalley Toyota of Roswell frequently costs less than independent shops when you include accurate diagnosis, OEM parts, and the long-term savings from proper repairs.
• We provide transparent estimates before work begins so you understand immediate costs and future savings from dealer-performed repairs.

What is the most common reason for check engine light on a 2015 Toyota Prius Plug-in?

• One of the most frequent causes is an evap leak from a loose or faulty fuel cap, which is simple to fix but should still be verified with a scan.
• Sensors such as the oxygen sensor or hybrid system monitoring sensors can also trigger codes as they age or if emissions components degrade.
• Addressing issues promptly at Nalley Toyota of Roswell prevents reduced fuel economy and more costly repairs later.
• Warranty-covered repairs must be performed at a certified dealership to ensure continued coverage and optimized lifecycle cost.