Sealey VS925 Lambda Sensor

The Sealey VS925 Lambda Sensor Tester tests Zirconia and Titania lambda sensors and the ECU across 1-4 wire configurations, whether heated or unheated. Its clear LED display reveals the sensor crossover signal and it can simulate rich or lean mixtures to verify ECU response without removing components. An insulation-piercing clip lets you tap into wires quickly, with the display confirming wire identity for easier setup. A built-in low battery indicator keeps you informed, and the unit runs from a supplied 9V battery for portable use. Model VS925 combines versatility with a compact form—ideal for diagnostics and confirming sensor health across modern engines.