AEM 30-4900 Wideband Failsafe Gauge User Manual
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Overview
AEM Wideband Failsafe is an advanced safety device that allows the end user to closely monitor the
performance of their engine. As a tuning tool, this device provides the ability to accurately monitor AFR,
while actively protecting the engine by constantly recording AFR curves and activating a user-defined
failsafe strategy if it runs dangerously lean or excessively rich.
The Wideband FAILSAFE Gauge is a UEGO (Universal Exhaust Gas Oxygen) controller with an internal
boost sensor, an internal data logger and a full color Organic Light Emitting Diode (OLED) display. It
includes technology to activate a failsafe strategy in the event AFR falls outside of a user-defined
operating window. If the AFR falls outside of the set operating window, the Wideband FAILSAFE Gauge
triggers a user defined output function that can save an engine from catastrophic damage.
Installation Diagram
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