GTC ST05 Oxygen Sensor Tester and Simulator - Automotive O2 Sensor Diagnostic Tool by General Technologies Corp | Perfect for Mechanics, DIY Car Repairs & Emissions Testing

The ST05 Oxygen Sensor Tester and Simulator is an easy-to-use tool for testing and diagnosing problems with any oxygen sensor (also known as lambda sensors).

The sensor signal output is shown in real time on the bar graph, while a 2 digit alphanumeric display shows the sensor output cross count per second

By pressing the ‘Test' button and performing a snap throttle acceleration of the engine, it tests the response time of the sensor and shows a pass or fail result within seconds

Two buttons allows for simulation of rich or lean conditions to monitor response of the engine control module

Diagnoses "lazy" (slow response) sensors, which may not set DTCs, but cause drivability problems

Sensor can be tested on or off the vehicle