The P0090 code on your 2020 Acura NSX indicates a problem with the fuel pressure regulator control circuit. The NSX's advanced twin-turbocharged hybrid powertrain requires precise fuel pressure control for optimal performance.
NSX Powertrain Overview
The 2020 NSX uses a 3.5L twin-turbocharged V6 combined with three electric motors producing a total of 573 horsepower. The gasoline engine uses direct injection requiring sophisticated high-pressure fuel delivery. The fuel pressure regulator control circuit manages this critical system.
Understanding P0090
This code indicates a general malfunction in the fuel pressure regulator control circuit. The issue could be electrical (wiring, connector, solenoid) or the regulator itself may not be responding to commands. On a high-performance engine like the NSX's, fuel pressure precision is critical.
Diagnostic Considerations
The NSX's complexity suggests dealer-level diagnosis. Use Honda/Acura HDS to access detailed fuel system data. Monitor regulator command versus response. Test the regulator solenoid's electrical operation. Check wiring between the ECU and regulator. Given the direct injection system, high-pressure fuel safety procedures apply.
Repair Approach
Wiring and connector issues are most common. The regulator solenoid may fail electrically. Internal regulator failure requires replacement of the fuel rail assembly. Given the NSX's exotic nature and warranty considerations, Acura dealer service is strongly recommended.