Frequently Asked Questions

What is the most common reason for check engine light on a 2017 Volkswagen Passat?

• Common causes include faulty oxygen sensors, evaporative emissions leaks (loose gas cap or purge valve), and occasional misfires.
• Left unfixed, these issues can reduce fuel economy, increase emissions, and lead to more costly repairs like catalytic converter replacement.
• Our dealership often costs less than independent shops for repairs while delivering factory-trained technicians and OEM parts, providing immediate and long-term savings.
• Warranty-covered repairs must be performed at a certified dealership to remain valid.

What does it mean when the check engine light comes on in a 2017 Volkswagen Passat?

• The light indicates the vehicle’s diagnostics system has logged a fault code; it can range from a minor sensor issue to an engine misfire.
• A steady light usually signals a non-emergency fault; a flashing light indicates a severe condition that needs immediate attention.
• Bring your Passat to our service center for a complete scan — our factory-trained technicians will interpret codes, recommend repairs, and explain short- and long-term costs.
• For warranty concerns, remember repairs must be completed at a certified dealership to preserve coverage.

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

• Start with simple checks: confirm the gas cap is tightened, check fuel level, and note any drivability changes like rough idle or loss of power.
• If symptoms persist, schedule a diagnostics appointment so our technicians can read stored codes with OEM-grade tools.
• Using Nalley Volkswagen of Alpharetta often saves you money versus independents, because we pair competitive pricing with factory diagnostics and genuine parts for lasting results.
• Any repairs that fall under warranty must be performed here or at another certified dealership to remain valid.

How much does a check engine light diagnostic cost for a 2017 Volkswagen Passat?

• Diagnostic fees vary, but our dealership provides transparent pricing and often lower total cost than independent shops thanks to accurate diagnostics and right-first-time repairs.
• Diagnostics typically cover a full scan and a technician’s assessment; follow-up repairs are quoted before work begins so you see immediate and long-term savings.
• If the repair is warranty-covered, it must be performed at a certified dealership to maintain coverage.
• Check our current offers at Service Specials or schedule at Service Scheduler.

How long does a check engine light service take?

• Basic diagnostics often take 30–60 minutes; the total service time depends on the issue uncovered and parts availability.
• Minor fixes (e.g., replacing a sensor or tightening the gas cap) can be completed the same day; more involved repairs require additional time for parts and quality checks.
• We prioritize accurate diagnosis and durable repairs by factory-trained technicians, which reduces repeat visits and saves you time and money overall.
• Schedule an appointment online at /service/schedule-appointment.htm to get an estimated timeline.