Frequently Asked Questions

How long does a check engine light service take?

• Initial diagnostic scan is typically 30–60 minutes using factory-level tools to read codes and live data.
• Minor repairs (loose gas cap, simple sensor swaps) often completed the same day; more complex repairs may require parts and additional time.
• Our factory-trained technicians provide accurate repair-time estimates up front and schedule work to minimize your wait.
• Using Nalley Volkswagen of Alpharetta can save you time and money long term—warranty repairs must be done at a certified dealership to remain valid.
• Schedule service quickly at our Service Scheduler: /service/schedule-appointment.htm.

What is the most common reason for check engine light on a 2023 Volkswagen Tiguan?

• Common culprits include a loose fuel cap, failed oxygen sensor, fuel trim issues, or ignition misfires.
• Evaporative emissions leaks (EVAP) and catalytic converter efficiency codes also appear frequently if unresolved.
• Early diagnosis at our dealership prevents escalation to costly components like the catalytic converter.
• Our technicians use OEM procedures to pinpoint root causes and preserve factory warranties and long-term value.
• Visit our service specials to see ways we help reduce immediate and long-term repair costs: /specials/service.htm.

What does it mean when the check engine light comes on in a 2023 Volkswagen Tiguan?

• It indicates the vehicle’s onboard computer has detected a fault — the severity ranges from minor to urgent.
• Codes can signal anything from emissions system issues to misfires or sensor failures that affect performance and economy.
• Ignoring the light can increase fuel consumption, accelerate wear, or cause engine and exhaust damage over time.
• Bring your Tiguan to Nalley Volkswagen of Alpharetta for an accurate scan and transparent repair plan using factory parts.
• Repairs covered under warranty must be completed at a certified dealership to remain eligible for coverage.

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

• Start with obvious checks: ensure the gas cap is tight and properly seated — it’s a common, simple cause.
• Note any drivability symptoms (noise, loss of power, stalling) and mention them to the service advisor.
• Do not simply clear the light and continue driving; a cleared code can hide progressive damage and void warranty remedies.
• For certified diagnostics and warranty-safe repairs, schedule an appointment at our dealership: /service/schedule-appointment.htm.
• If the light is flashing, stop driving and contact us immediately to avoid severe engine or catalytic damage.

How much does a check engine light diagnostic cost for a 2023 Volkswagen Tiguan?

• Diagnostic fees vary; standard OBD-II scans at our dealership are competitively priced and clearly disclosed before work begins.
• We often cost less than independent shops when you factor in accurate diagnosis, OEM parts, and long-term savings from correct repairs.
• If a repair is covered under warranty, it must be performed at a certified dealership — we honor all factory warranty processes.
• Choosing Nalley Volkswagen of Alpharetta helps avoid repeated visits and added expenses from misdiagnosis.
• Check current offers and service specials to reduce your out-of-pocket cost: /specials/service.htm.