Frequently Asked Questions

What is the most common reason for check engine light on a 2021 Acura NSX?

• Loose or damaged fuel cap and simple EVAP system leaks are frequent, low-cost causes that are easy to verify.
• Sensors such as oxygen (O2) or mass airflow (MAF) can trigger the light; sensor replacement is a common remedy.
• Misfires or ignition issues may appear on a high-performance hybrid like the NSX and should be addressed promptly to avoid catalytic damage.
• Catalytic converter efficiency codes occur if upstream faults persist—delaying repair raises costs significantly.
• Bring your NSX to Nalley Acura for accurate code reading and a clear plan to avoid secondary failures and preserve warranty eligibility.

What does it mean when the check engine light comes on in a 2021 Acura NSX?

• It indicates the engine control module detected a fault in emissions, fuel, ignition, or related systems; severity ranges from minor to urgent.
• Codes can point to sensor failures, misfires, EVAP leaks, or catalytic issues—each with different risk levels for the engine and turbo system.
• Diagnostic testing is required to read the stored fault codes and freeze-frame data for an accurate diagnosis.
• Nalley Acura uses OEM diagnostic tools and factory-trained technicians to identify root causes and recommend repairs that protect long-term value.

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

• Check that the fuel cap is tight and undamaged—an easy first step that resolves many EVAP-related codes.
• Note any drivability symptoms: loss of power, rough idle, or unusual noises—especially if the light is flashing.
• Look for on-screen messages in the instrument cluster and avoid prolonged high-load driving until cleared by a technician.
• If the light is flashing or performance is affected, arrange towing to the dealer to prevent further damage to the turbochargers or catalytic converter.

How much does a check engine light diagnostic cost for a 2021 Acura NSX?

• Typical dealer diagnostic fees range modestly (for example, in the industry commonly around $99–$199) depending on complexity and scan time.
• Nalley Acura often costs less than independent shops overall because we prevent secondary failures and apply accurate OEM fixes that reduce repeat visits.
• Diagnostic fees may be credited toward approved repairs; repairs covered under warranty must be performed at a certified dealership to remain valid.
• We provide transparent estimates before work begins so you see immediate and long-term savings from professional dealer service and genuine parts.

How long does a check engine light service take?

• Initial computerized diagnostics commonly take 30–90 minutes to retrieve codes, freeze-frame data, and live parameters.
• Simple repairs, such as tightening a fuel cap or replacing a sensor, are often completed the same day; more complex repairs can take several hours to a day.
• Nalley Acura prioritizes accurate diagnosis to avoid repeat visits—this efficiency delivers immediate savings and reduces long-term ownership costs.
• Warranty repairs and hybrid/performance system work are performed by our factory-trained technicians using OEM tools and genuine parts for documented, reliable results.