Date: Sun, 11 Mar 2007 18:35:23 -0400 From: Fred W <malt_houndnospamo.com> Subject: Re: Oxygen sensor
kingdoodlesquat wrote: > Hello all, > > I've recently bought a '98 900S turbo & was having a look at the fuses by > the passenger door (like you do) & have discovered that fuse 38 for the > oxygen sensor has blown it fuse. First off, what does the sensor do & is it > the same thing as the lambda sensor? Second thing, is this likely to cause > any damage if it's not working? > > It runs really wells at the moment & I've not noticed any drop in > performance, so I'm at a loss at what the problem really is. > > tia > > kds > > First off, yes the O2 senosr is the same as a "lambda" sensor. The only part of the sensor that gets power is the heater. The purpose of the heater is to get the sensor up at operating temperature faster so that the ECU can go into closed loop mode faster. This design minimizes the higher emmissions period of "open-loop" warm-up mode. If there is a problem with it you would notice it about 3-5 minutes after a cold start when the ECU tries to switch over to closed loop. Normally, you would then get a check engine fault of some sort. You may want to verify that you Check Engine lamp is OK, and has not been defeated by the prior owner or unscrupulous salesman. -- -Fred W
