Ford Focus 2002 O2 Sensor Problems

Asked by GuruTGZ6Q Jul 28, 2018 at 04:26 AM about the 2002 Ford Focus LX

Question type: Maintenance & Repair

So I've been replacing everything in my Ford Focus , one
day out of the blue it lost acceleration and stalled. Since
then , it starts but has a rough idle and when you try to drive
it and stop, it stalls. I've been replacing a lot of things it
could be : spark plugs, plug wires, just replaced alternator,
did a compression test, and a few other things. The only
code it's throwing is a code for the O2 Sensor; p0135 , I've
replaced both sensors and it still has a rough idle. I'm
thinking possibly the certain O2 sensors I used to replace
the old ones could be the wrong ones. I just bought two
Bosch ones from Autozone. I'm really not sure what to do.
Any help will be very appreciated.

1 Answer
7,455

Brianator answered 6 years ago

O2 sensor circut malfunction. You probably have a bad wire or connector but you check check your fuses for one labeled H0S or HEGO

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