I have a question about AEM 30-0300 wideband

[Moagly mike]

I have my wideband installed, white wire to analog0, brown to analog ground, also keyed 12v source to red wire on sensor with 5amp fuse. and sensor is grounded in the car. total of 4 wires connected.
but for some reason on my display it shows my analog0 is seeing 7.3v and my gauge doesnt read the same as ecu.
i keep reading the sensor ground should be close to the ecu ground so theres no voltage difference?

any help would greatly be appreciated

[Spunkster]

What happens if you remove the analog ground?

[Moagly mike]

It looks like analog voltage went up to 18.8v I got nervous and shut it off, didn’t pay attention to the wideband. I just don’t want to fry my ecu

[Spunkster]

Something is wired incorrectly as it should not be higher than 5 volts. Have you measured it with a multimeter?

[Moagly mike]

Is it possible I damaged the wideband sensor and that’s why, I’ll check the wiring over and check with a multimeter also to confirm

[Moagly mike]

Using the ground the sensor is grounded to and the white wire I got 4.38v

[Spunkster]

Post your calibration and a datalog showing the issue.

[Moagly mike]

wideband testing.kdl

[Moagly mike]

wideband testing1.kal

[Spunkster]

I'm not seeing the problem you are describing in the datalog.

[Moagly mike]

EBD70385-D087-47E9-BEF3-5C76A51F395E.jpeg

[Spunkster]

The datalog you have posted does not show this

[Moagly mike]

wideband analog0.kdl

hopefully i did it right this time,

[Spunkster]

Are you sure you have it set to show voltage and not the AF ratio, as I do not see voltages you are describing anywhere in the datalogs you have posted.

[Moagly mike]

Honestly I don’t know I’ll look into it a little more, the screenshot I sent says analog0 v I assumed that meant voltage, although I noticed it matched what the afr said so maybe it’s something I’m doing wrong. I just wanted to make shure I didn’t fry my ecu and I appreciate you looking into this for me