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, simple cause and can trigger the light.
• Look for obvious symptoms: odd smells, smoke, loss of power, or strange noises — these affect urgency.
• Verify fluid levels quickly: oil or coolant low levels can indicate larger problems.
• Keep records: bring your vehicle to a certified dealership so any warranty-covered repairs are properly recorded and performed.
• If you’re unsure, schedule a fast diagnostic with our service team at https://www.nalleyvw.com/service/schedule-appointment.htm.

How long does a check engine light service take?

• Initial diagnostic typically takes 30–90 minutes depending on code complexity and road-test needs.
• Simple fixes (gas cap, sensor replacement) can often be completed same day; complex repairs require a quote and parts.
• Our certified technicians prioritize accurate repair to avoid repeat visits and higher long-term costs.
• We provide clear time estimates when you arrive and offer scheduled appointments to reduce wait time.
• Book online to reserve a slot: https://www.nalleyvw.com/service/schedule-appointment.htm.

What does it mean when the check engine light comes on in a 2018 Volkswagen Tiguan?

• The light signals a detected fault in emissions, engine, or powertrain systems — severity ranges from minor to urgent.
• Common triggers include sensor failures, misfires, EVAP leaks, or catalytic converter issues.
• Diagnostic scanning identifies specific trouble codes so technicians can recommend the correct repair.
• Repairs covered under warranty must be completed at a certified dealership to preserve coverage and ensure proper repair.
• Contact Nalley Volkswagen of Alpharetta for a reliable diagnosis by factory-trained technicians.

How much does a check engine light diagnostic cost for a 2018 Volkswagen Tiguan?

• Diagnostic fees vary by scope, but our dealership offers competitive pricing and transparent estimates before work begins.
• We often cost less than independent shops when you factor in accurate diagnosis, genuine parts, and factory-trained labor.
• Choosing the dealership can produce immediate savings (faster correct repair) and long-term savings (fewer repeat repairs).
• Remember: any warranty-covered repairs must be performed at a certified dealership to remain valid.
• Contact us for a precise estimate and current service specials: https://www.nalleyvw.com/specials/service.htm.

What is the most common reason for check engine light on a 2018 Volkswagen Tiguan?

• A loose or faulty gas cap is one of the most frequent and simplest causes to resolve.
• Oxygen sensor failures and catalytic converter issues are common and affect fuel economy and emissions.
• Ignition misfires or faulty spark plugs/coils cause drivability problems and require prompt attention.
• Ignoring codes can increase repair costs later; our dealership focuses on correct diagnosis to minimize long-term expense.
• If you suspect a serious issue, bring your vehicle to Nalley Volkswagen of Alpharetta for certified inspection and repair.