Frequently Asked Questions

What is the most common reason for check engine light on a 2025 Nissan Frontier?

• Loose or damaged gas cap — the simplest and most frequent cause; it can trigger an EVAP system alert.
• Faulty oxygen sensor — impacts fuel trim and emissions, often logged as O2 codes.
• Spark plugs or ignition issues — misfires that increase emissions and can harm the catalytic converter.
• EVAP leaks or purge valve faults — common on newer trucks after refueling or aging hoses.
• Early maintenance items are often inexpensive to fix at the dealership and prevent larger future costs.

What does it mean when the check engine light comes on in a 2025 Nissan Frontier?

• It signals that the vehicle’s onboard diagnostics detected an emissions or engine system fault and stored a trouble code.
• The severity ranges from a minor EVAP leak to active misfires that require immediate attention.
• A single steady light usually indicates a non-urgent but required diagnostic; a flashing light often means a severe problem.
• Proper diagnosis at a certified dealership ensures accurate repair, preserves warranties, and reduces long-term costs.
• We recommend scheduling service so factory-trained technicians can read codes and advise next steps.

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

• Secure the gas cap: tighten it until it clicks and drive a short distance — a loose cap is a common, quick fix.
• Look for other dashboard warnings or unusual behavior like rough idle, loss of power, or fluid leaks.
• If the light is flashing or the vehicle runs poorly, minimize driving and contact the dealership immediately.
• Even after a simple fix, have the truck scanned at Crown Nissan of Greenville to clear codes and confirm no underlying faults.

How much does a check engine light diagnostic cost for a 2025 Nissan Frontier?

• Typical diagnostic scan fees range from modest to moderate depending on inspection depth; many dealers offer service specials — check our Service Specials page.
• Crown Nissan of Greenville often costs less than independent shops because we provide precise diagnostics, genuine parts, and factory-trained technicians that prevent repeat repairs and deliver long-term savings.
• Immediate savings come from accurate diagnosis and correct parts; long-term savings come from avoiding collateral damage like catalytic converter failure.
• Remember: repairs covered under warranty must be performed at a certified dealership to preserve coverage.
• Schedule appointments online via our Service Scheduler for fast service and transparent pricing.

How long does a check engine light service take?

• Initial scan and code read typically takes 30–60 minutes; a full diagnostic inspection can take 1–3 hours depending on fault complexity.
• Simple fixes such as tightening a gas cap or replacing a sensor are often completed same-day.
• Complex repairs like ignition or catalytic converter work may require parts ordering and can extend to a day or more.
• Crown Nissan of Greenville prioritizes efficient scheduling and transparent timelines; we communicate estimates and options before proceeding.
• Use our Service Scheduler to reserve a convenient appointment and reduce wait time.