Frequently Asked Questions

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

• Ensure the gas cap is tight — a loose or damaged cap is a common trigger for the light.
• Look for other dashboard warnings, driving symptoms, or reduced performance before driving further.
• Check fuel level and basic fluids; visible leaks or smoke require immediate attention.
• If symptoms are mild, schedule a prompt diagnostic with our service team to prevent escalation.
• Remember: warranty-covered repairs must be done at a certified dealership to preserve coverage.

How long does a check engine light service take?

• Initial diagnostic scan typically takes 30–90 minutes depending on code complexity and test needs.
• Quick fixes (gas cap, minor sensors) can often be completed the same day.
• More involved repairs (oxygen sensors, coils, catalytic converter) may take several hours to a day.
• We offer efficient scheduling, OEM parts, and factory-trained technicians to minimize downtime and long-term costs.
• Use our online scheduler for an appointment: Schedule Service.

What is the most common reason for check engine light on a 2022 Volkswagen Passat?

• Common causes include a loose gas cap, failing oxygen sensor, EVAP system leaks, misfires from ignition components, or catalytic converter issues.
• For the 2.0L turbo engine, oxygen sensors and EVAP components are frequent culprits due to emissions monitoring.
• Ignoring codes can reduce fuel economy and cause costly downstream damage like catalytic converter failure.
• Our dealership often costs less than independent shops while providing factory diagnostics and genuine parts for immediate and long-term savings.
• Warranty-covered repairs must be completed at a certified dealership to remain valid.

How much does a check engine light diagnostic cost for a 2022 Volkswagen Passat?

• Diagnostic fees typically range from around $80 to $150 for the initial scan and inspection, varying by complexity.
• At Nalley Volkswagen of Alpharetta we aim to deliver better value than many independent shops—lower overall costs through accurate diagnosis, OEM parts, and fewer repeat visits.
• If repairs are needed, the diagnostic fee is often applied to the repair order for immediate savings.
• Warranty or campaign-related diagnostics may be covered—warranty repairs must be performed at a certified dealership.
• Check current offers before you come in: Service Specials.

What does it mean when the check engine light comes on in a 2022 Volkswagen Passat?

• It means the vehicle’s onboard diagnostics detected an emissions or engine system issue and stored a trouble code.
• Codes range from minor (loose gas cap) to serious (misfires, catalytic converter damage) and require professional interpretation.
• Driving with unresolved issues can harm fuel economy, emissions equipment, and long-term engine health.
• Bring your Passat to our certified technicians for accurate diagnosis using OEM tools and genuine parts to protect warranty and save you money over time.
• Schedule service or view inventory: All Inventory • Used Inventory.