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 is quick to fix.
• Note any changes in performance, strange noises, or smells before driving further.
• Record when the light came on and whether it is steady or flashing; that helps our technicians prioritize.
• If the vehicle runs normally, schedule a diagnostic at Nalley Toyota of Roswell to confirm codes and avoid escalation.
• Remember: warranty-covered repairs must be performed at a certified dealership to preserve coverage and long-term savings.

How much does a check engine light diagnostic cost for a 2022 Toyota Prius?

• Diagnostics at Nalley Toyota of Roswell are competitively priced and often cost less than independent shops when you factor in accuracy and included inspection.
• Our factory-trained technicians use Toyota-grade tools to read codes and assess root causes, reducing repeat visits and long-term expense.
• If repairs are covered by warranty, they must be completed at a certified dealership to protect your coverage and avoid out-of-pocket costs.
• We explain immediate repair options and long-term savings—preventing small issues from becoming expensive failures.
• Typical diagnostic times and estimates are provided up front so you can make an informed decision.

What does it mean when the check engine light comes on in a 2022 Toyota Prius?

• A check engine light signals that the vehicle’s computer has detected a fault in the emissions, engine, or hybrid systems.
• Causes range from minor (loose gas cap) to moderate (oxygen sensor, EV/inverter faults) to serious (catalytic converter or engine misfire).
• Because the Prius combines gasoline and hybrid systems, accurate diagnostics by factory-trained technicians is important to isolate cause and avoid misdiagnosis.
• Bring your vehicle to Nalley Toyota of Roswell for a full scan and clear explanation of repairs and expected costs.
• Timely service with certified parts protects warranty coverage and delivers both immediate and long-term savings.

How long does a check engine light service take?

• Diagnostics typically take 30–90 minutes depending on code complexity and whether additional testing is required.
• Simple fixes, like tightening or replacing a gas cap, can be resolved same day; sensor or component replacements may require parts and a few hours.
• When warranty work is involved, we handle authorization and repairs efficiently so you spend less time waiting.
• Nalley Toyota of Roswell communicates estimated completion times and offers service options that maximize immediate and long-term savings.
• Our factory-trained technicians and Toyota tools help reduce rework and return visits, saving you time and money overall.

What is the most common reason for check engine light on a 2022 Toyota Prius?

• One of the most frequent causes is a loose or faulty gas cap triggering an evaporative emissions code.
• Other common sources include oxygen sensors, catalytic converter efficiency codes, and occasional ignition misfires.
• Hybrid-specific systems can also generate codes; accurate diagnosis prevents unnecessary part replacement.
• Addressing the issue promptly at our dealership avoids larger repairs and preserves warranty protection.
• Our technicians will identify the root cause, outline cost-effective repairs, and explain immediate and long-term savings compared with piecemeal fixes.