there sure can be more than 1 sensor infact you'll have a minimum of 2, so you need to look at and see if you can find them all.

 

21 Upstream HO2S stays at center Harness and connector / Upstream HO2S
21 Upstream HO2S shorted to voltage Harness and connector / Upstream HO2S
21 Upstream HO2S response (M/T) Harness and connector / Upstream HO2S
21 Upstream HO2S heater failure (M/T) Harness and connector / Upstream HO2S
21 Downstream HO2S stays at center (M/T) Harness and connector / Downstream HO2S / Fuel system
21 Downstream HO2S heater failure (M/T) Harness and connector / Downstream HO2S
21 Downstream HO2S shorted to voltage (M/T) Harness and connector / Downstream HO2S

 

Thank you!

Hmm, when I looked at the parts list (the pdf-document) I saw that it could be 4 of them, one after the extract, one after the manifold and two around the catalytic converter.

Gonna try to change the one after the extractor.. =)

Best regards

 

Check for VOLTAGE first!!! if there is no voltage none will work and you can swap forever and never fix it

 

How will I check for voltage?

There are 4 wires to each of the sensors =/

 

i use a scanner. it shows me the voltage the computer is seeing.

 

hi again!

I only have a voltage-meter.

How will I measure the voltage, loosen the connectors one by one and connect to which wires? There are 4 wires to each of the sensors.

 

IDK, that's what service manuals have infomation on. it also depends on which side you measure with it unplugged.

there's a 12v wire, a couple ground wires and a signal wire