o2 sensor bad ground?

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Aug 30, 2016 | 09:40 PM

fayettevillin

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From: Fayetteville NC

o2 sensor bad ground?

im trying to find out if my o2 has a bad ground on the harness. im not using the downstream sensors my question is can I plug the upstream in to the down stream and swap the info on hptuners? basically using the downstream harness for the upstream until I track it down? sensor is brand new and only reading 448 on hptuners

Aug 31, 2016 | 10:14 AM

2xLS1

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From: Warr Acres, OK

Not without swapping the wires on the PCM plug. O2 sensor position assignment is not software selectable. And there are 2 grounds on a 4 wire O2 sensor. There is the signal ground that always runs to the PCM and the heater ground which depending on the model year can either be tied to chassis ground or supplied by a PCM output.

Aug 31, 2016 | 11:27 AM

kingtal0n

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The ground on the O2 sensor doesn't need to be there at all. They sell 1-wire sensors for example, which work just fine in place of the 4-wire sensors.

Aug 31, 2016 | 02:05 PM

2xLS1

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Go post on a forum you know something about.

Aug 31, 2016 | 05:52 PM

kingtal0n

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Umad?

Quote:

Originally Posted by 2xLS1

Go post on a forum you know something about.

Are you trying to say I cant use a 1, 2, or 3 wire random narrowband sensor in a random 4.x 5.x or 6.xL V8 engine made by chevrolet? Because I would bet you some serious $$ it will work just fine, any random narrowband from any car with the same thread, out of thousands available, will work. Let me know if you want to back up that challenge with some real $$. And stop being mad when people post that know more than you kthx.

Aug 31, 2016 | 06:31 PM

fayettevillin

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From: Fayetteville NC

2 of the 4 ohm to ground when I check with my meter

Sep 5, 2016 | 07:02 PM

fayettevillin

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From: Fayetteville NC

im getting 12v went straight to ground on the harness still reads 448mv does anyone know which pins they are on the ecu I'm going to try and run the + and - straight to the 02