aem afr gauge troubleshooting, The 52mm (2-1/16”) AEM X-Series Universal Exhaust Gas Oxygen (UEGO) Gauge features a four digit central readout and sweeping 24-color-coded LED display, providing immediate reference to the engine air fuel ratio (or lambda) in real-time.

Offset Numerator 02095 10.Offset Denominator 00000100 On AEM EMS configure Serial telemetry byte #11 to MAP VOLTS (Custom 001). Should the unit output closer to 5V when in free air? It seems odd that it would top out at 4.31v.

which matches the AEM gauge perfectly with the oxygen sensor unplugged! The only two questions outstanding are the voltage range of the sensor and the voltage gain thru the scanner. You would need an additional device, called an analog to digital converter, to convert this to a digital value that Evo Scan can use. The exact numbers will depend on the gauge.

An analog output would vary a voltage on that pin, usually between 0-5V DC, with the voltage being proportional to the AFR/boost (eg 18 AFR = 5V and 9 AFR = 0V).

Connect AEM White to SCT Orange | Connect AEM Black to Vehicle Ground and SCT BLUE AEM Wideband Formula in Air Fuel Ratio = (v*2)+10 AEM Wideband Formula in Lambda = (v*0.078557)+0.751 If you have any ground offsets, add or subtract them from the voltage (v).

I'm assuming this is a voltage offset issue? The way I have the wide band connected is like this AEM Uego 30-4110 Red: 12v Power via cig lighter adapter Black: ground on cig lighter adapter White: input 1 on my hpt pro unit Blue: input 5 on my hpt pro unit I'm using the cig lighter adapter that came with the autometer pod kit that my Uego is.

AEM 30-2001 Bosch LSU 4.2 Wideband UEGO AFR O2 sensor, Schwarz/Silber Das Kit enthalt den Sensor Bosch 4.2LSU fuer die Verwendung mit jedem AEM Wideband UEGO Controller oder Messgerat.

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