Standard Ignition AC540 Idle Air Control Valve

Idle Air Control Valve for Nissan Sentra

Standard Ignition AC540 is an idle air control valve for select Nissan Sentra models with California emissions. It is built with a square connector shape, two hose connectors, and a 6-terminal electrical connection for direct replacement service on the specified applications.

Compatible With 2000-2006 Nissan Sentra, auxiliary air valve applications with California emissions, and 2001-2002 Nissan Sentra primary California emissions applications. Standard Ignition AC540 is a practical replacement for restoring idle air management on the listed vehicles.

Key Features

• Idle air control valve for fuel injection system service
• Square connector shape for the listed fitments
• Two hose connectors and 6 terminals
• Gaskets included for installation on the specified application
• Hardware included for the specified application
• Direct-fit coverage for select Nissan Sentra California emissions models

Product Details

Standard Ignition AC540 is an idle air control valve used to regulate bypass air at idle on the listed Nissan Sentra applications. The valve is specified with a square connector, two hose connections, and a 6-terminal layout, making it important to match the electrical and hose configuration before installation. This part number, AC540, also cross-references 2-16825 for the same application.

For fitment-based searches, this part is commonly referenced as an idle air control valve for 2000-2006 Nissan Sentra with California emissions and auxiliary air valve service, as well as 2001-2002 Nissan Sentra primary California emissions applications. If you are sourcing Standard Ignition AC540 for a Nissan Sentra idle speed concern, verify the emissions configuration and connector style against the original component.

Common Issues This Part May Address

• Unstable or fluctuating idle speed
• Idle speed that is too high or too low
• Stalling when the engine returns to idle
• Rough idle after warm-up or during stop-and-go driving
• Idle air control fault codes related to the valve circuit or airflow control

Installation Notes

Confirm the connector shape, terminal count, hose connection layout, and emissions application before installation. Clean the throttle body and related air passages during service so the replacement valve can operate against a clear airflow path. Use the included gasket and hardware where specified for the application, and clear any stored diagnostic trouble codes after installation.

Quality Assurance

Standard Ignition AC540 is built for the listed Nissan Sentra fitments and follows the specified connector, hose, and terminal configuration for application matching. Standard Ignition is a recognized aftermarket source for ignition and engine management components.