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Is there 1 or 2 O2 sensor on the 4cyl Mx3?
Posted: October 18th, 2005, 2:07 am
by Prexus2005
I see the one up front which is obvious... is there another one beneath the car? I thought I checked and didn't see another... but a friend insists there are 2 on almost all cars...
Help?
Thanks,
Phil.
Posted: October 18th, 2005, 4:54 am
by neutral
You definitely just have the one O2 sensor on your '92 4 cyl - same as on my '95 RS. IIRC, the addition of a second O2 sensor on most 4 cyl cars didn't happen til 1996 when the On Board Diagnostics (OBD) system went from the less sophisticated OBD1 to a more complex OBD2 engine control unit (ECU) that could handle input from the added O2 sensor.
As a side note - For the MX-3 GS V6, pre 1996 models (had OBD1) and two O2 sensors but remember, that's for a V6, not the 4 banger. 1996 and later (OBD2) GS models have four O2 sensors.
Posted: October 18th, 2005, 6:57 am
by yiorta
Only one. You will also find it written as "Heated Oxygen Sensor".
Posted: October 18th, 2005, 10:39 pm
by Prexus2005
alrighty. Thanks guys. =)
Phil.