Hi I have a brand new AEM x series Uego 30-033 and I can’t get it to match what tunerstudio says, mine will be at 11 AFR and tunerstudio will read past 18 AFR’s. The voltage at the white signal output wire while running is 3.2V. And I have the ground pinned out to #5 pin for chassis ground. Any help?

 

Did you calibrate it using the custom linear wideband option in tunerstudio? Pretty sure its 0.5v = 8.5 AFR and 4.5v = 18.00.

You may also need to ground it at the same location as the ECU if this doesn't get it close enough. Worst case scenario wire it up for CANbus and you don't need to deal with ground voltage offset issues and such. (1.5.0 firmware required)

 

I have not tried the custom linear input, I’ll give it a try tomorrow !

 

AFR gauge is reading 11.2 when tunerstudio is reading 16. I went through and confirmed the values. Idk what else to do

 

Where did you splice in the signal wire for the car? (the wire off the gauge > megasquirt) I believe I only got accurate readings for it when splicing into a wire on the ECU harness. I originally tried to splice it off somewhere silly like a wire on the CAS and predictably the value was of something completely different in TS while being correct on the gauge, as it was reading the voltage of that wire for the CAS and not from the widebands voltage reading. Its either a wrong wire issue or the black ground wire + sensor ground needs to be moved to the ECUs grounding point