bad 02

[ken06]

I have a logger from DSMloggers.com with palm n stein software. I have a serious issue with the O2 readings. Half of the time the O2 voltage is 0.00. It does this under idle, acceleration or cruising. The other half of the time it reads fine and reasonable voltages. Engine fault codes are P0170 (fuel trim malfunction) and P1400 (Manifold Differential Pressure Sensor). Slight smell of gas at idle, no smoke at any time, and I am getting fair gas mileage. Does this mean my 02 sensor only works half of the time, or is there a problem with the signal from the OBII port (but isn't this the same data the ECU uses?)?

 

[droppinbottom]

That is the same data the ecu sees but I am wondering if it is a problem with your cable. Does everything else work properly?

 

[dub2gsx]

Mine did the same right before it went out! Just buy this one
http://www.densoproducts.com/more_info.asp?AAIA=1316593&pid=1937

Then you can run race gas without burning out another stock O2 sensor

Brian

 

[ken06]

Hey thanks for the advice and the link, that is way cheaper than everything else I've seen online. Its not the cable because all the other data is accurate but only the O2 has a strange signal. Well time to spend more money

 

[dub2gsx]

Glad I could help ya!

Brian