Frequently Asked Questions

What is the most common reason for check engine light on a 2012 Hyundai Genesis 4.6?

• Common causes include faulty oxygen sensors (P013x), ignition misfires (P0300-P0308), and EVAP leaks (P0455).
• Worn spark plugs or coils on the V8 can lead to misfires and reduced performance.
• Failure to address codes can damage the catalytic converter — a much more costly repair.
• Our dealership often costs less than independent shops for accurate diagnosis and fixes, with factory-trained technicians and OEM parts.
• Repairs covered under warranty must be completed at a certified dealership to remain valid.

What does it mean when the check engine light comes on in a 2012 Hyundai Genesis 4.6?

• It signals that the vehicle's onboard computer detected a fault — anything from a loose gas cap to engine misfire or emissions issues.
• An OBD-II scan retrieves a trouble code that pinpoints the affected system or component.
• Some issues are minor; others can cause long-term damage or failed emissions tests if ignored.
• Bring your vehicle to Nalley Hyundai for precise diagnostics and to preserve warranty coverage when applicable.

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

• Check for a loose or missing gas cap — an easy fix that can clear an EVAP code.
• Note whether the light is steady or flashing; a flashing light indicates a serious condition that needs immediate attention.
• Use an OBD-II scan tool or have our service team read the code to determine the exact fault.
• If under warranty, repairs must be done at a certified dealership like Nalley Hyundai to maintain coverage.

How much does a check engine light diagnostic cost for a 2012 Hyundai Genesis 4.6?

• Diagnostic fees typically range between $80 and $140, depending on the complexity of the scan and live data testing required.
• Nalley Hyundai often provides better overall value than independent shops due to precise diagnosis and fewer repeat repairs.
• Service specials and bundled offers can reduce immediate costs; accurate diagnosis reduces long-term expenses by preventing unnecessary parts replacement.
• Warranty-covered diagnostics and repairs must be completed at a certified dealership to retain coverage and long-term savings.

How long does a check engine light service take?

• Basic diagnostics and code reading generally take 30–60 minutes; more complex issues require additional testing and road data analysis.
• Repairs vary: a gas cap or sensor replacement can be completed in an hour, while catalytic or engine repairs take longer.
• Nalley Hyundai prioritizes efficiency with factory-trained technicians and proper OEM tools to minimize downtime.
• Scheduling service through our website or service specials page helps reduce wait times and provides transparent cost estimates.