Standard Ignition TH401 Throttle Position Sensor

Throttle Position Sensor for Land Rover Applications

Standard Ignition TH401 is a throttle position sensor built for direct replacement service on select Land Rover Discovery and Range Rover models. It uses a 3-terminal blade design with a female plug-in connector to support accurate throttle input signal transfer in the engine management system.

Key Features

• Throttle position sensor for emission control and engine management systems
• Female connector with plug-in connection style
• 3 male blade terminals for secure electrical contact
• Direct-fit service part for select Land Rover Discovery and Range Rover applications
• Standard Ignition TH401 cross-references to OE-style replacement numbers for the same application

Detailed Description

Standard Ignition TH401 is designed for 1999-2004 Land Rover Discovery and 2003-2004 Land Rover Range Rover applications. As a throttle position sensor, it reports throttle movement to the vehicle control system so the engine can respond correctly to accelerator input. The connector layout includes one female plug-in connector and three male blade terminals, matching the electrical interface used on the listed vehicles. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

For buyers searching for a Land Rover Discovery throttle position sensor or a Range Rover throttle position sensor, TH401 provides a focused replacement option for the listed model years. The Standard Ignition TH401 part number is also useful when verifying interchange references during diagnosis or parts lookup.

Common Issues This Part May Address

• Erratic throttle signal readings
• Delayed or inconsistent accelerator response
• Throttle-related drivability concerns
• Check engine light conditions tied to throttle position input
• Rough idle or hesitation related to sensor signal loss

Installation Notes and Tips

Confirm connector style, terminal count, and vehicle application before installation. Inspect the throttle body connector and wiring for corrosion, bent terminals, or damaged insulation before replacing the sensor. After installation, clear diagnostic trouble codes and verify throttle signal operation with a scan tool if required by the vehicle service procedure.

Quality Assurance

Standard Ignition is a recognized aftermarket brand for electrical and engine management components. TH401 is built to match the listed connector and terminal configuration for the specified Land Rover Discovery and Range Rover applications.