Do all fiesta's have 2 oxygen sensors?

[row10036802]

I have a fietsa 1.25 zetec it only has one oxygen sensor is this right? i thought it needed one pre and one post to compare values?

its a 1998 fiesta 1.25

HELP... Please

[callisto]

It only has one, the pre-catalyst sensor.

The cars with two sensors are the Euro 3/4 compliant ones that came in around 2000 IIRC

The post-cat sensor does nothing more than inform the ECU that the cat is most likely shagged so it can light up the "Check Engine" light on the dash. It has nothing to do with the closed-loop engine control of the pre-cat sensor, and its value is not compared with it either.

[row10036802]

Thanks that clears that one up.

much appreciated