Frequently Asked Questions

What is the most common reason for check engine light on a 2016 Hyundai Sonata Plug-in Hybrid?

• Common causes include ignition misfires, aging oxygen sensors, catalytic converter issues, or emissions system faults that a scanner will identify.
• Plug-in hybrid systems can also flag battery charge or inverter warnings that require specialized hybrid diagnostics.
• Addressing these early at Nalley Hyundai often costs less than independent shops while delivering OEM parts and factory-trained tech expertise.
• Repairs covered under warranty must be performed at a certified dealership to preserve coverage and ensure long-term savings.

What does it mean when the check engine light comes on in a 2016 Hyundai Sonata Plug-in Hybrid?

• A steady light means the car’s computer detected an emissions or powertrain issue that needs diagnosis but may not be an immediate danger.
• A flashing light signals a severe problem such as repeated misfires that can damage the catalytic converter—stop driving and seek service.
• At Nalley Hyundai, we perform a full scan, explain the codes, and offer transparent cost estimates so you see immediate and long-term savings compared with patch repairs.
• If covered by warranty, repairs must be completed at a certified dealership to maintain protection and proper documentation.

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

• Start with simple items you can check immediately: a loose or damaged gas cap can trigger a code and is an easy fix.
• Next, note any drivability changes—rough idle, loss of power, or strange noises—to share with technicians.
• Bring the vehicle to Nalley Hyundai for a professional scan; our factory-trained team pinpoints the issue and recommends cost-effective repairs.
• Using the dealership often lowers total ownership costs thanks to OEM parts, accurate diagnostics, and warranty protection.

How much does a check engine light diagnostic cost for a 2016 Hyundai Sonata Plug-in Hybrid?

• Diagnostic fees vary by the depth of testing; at Nalley Hyundai we offer competitive diagnostic rates and clear explanations of recommended repairs.
• Because we use factory-grade scanners and hybrid-capable tools, our diagnosis is more accurate—reducing the chance of unnecessary repairs and long-term expense.
• When repairs are required, performing them at our certified dealership can save you money over time through correct repairs, OEM parts, and warranty coverage.
• Check our Service Specials page for current offers and contact our service team for an exact diagnostic quote.

How long does a check engine light service take?

• Basic diagnostics and code reading typically take under an hour; more complex repairs or hybrid-system checks may require additional time for thorough testing.
• If parts or detailed inspections are needed, we provide a clear timeline and coordinate parts to minimize downtime.
• Choosing Nalley Hyundai often speeds resolution thanks to OEM tooling and manufacturer-supported procedures, translating to faster, more reliable repairs.
• Repairs covered by warranty must be completed at a certified dealership to ensure proper documentation and continued coverage.