I'm going to check the color sometime this week. I also spoke with PLX and they told me to check the harness... it's only $20... So hopefully it's that. I'll let you know

 

Okay... Here is how the wires are set up.

RED/BLACK wire: Ground

Grey wire: connected to blue ECU wire...

White wire: not connected to anything

RED wire: connected to GREEN/ ORANGE wire which is located under the steering wheel.

Any ideas? are they connected correctly?

 

Double post

 

The grey wire is the narrow band signal which is like your stock 02.
The white wire is the wideband signal which should go to a gauge.
Do you have a wideband gauge???
Why do you have the grey wire hooked up to the ecu. Are you not using the factory 02 sensor anymore.

 

Wideband gauge... yes, i do. the unit itself. The PLX M-300 (digital numbers) and no i don't have a factory o2 sensor. i want the wideband connected start to the ecu. i need a downstream bypass o2 sensor... so my ecu wont get confused. Do you understand or am i confussing the hell out of you??? lol...