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rover_400_95_99
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Discussion Starter #1
Hello! I had a bad oxygen sensor, for long, it was giving very low volt reading! after I put a new one, I turn ignition key position 2 with the engine off gives about 0,80 volts line! I turn the ignition on,(line picked up while the starter turns the engine to start, after few seconds started volt goes above 1 volt lost from the screen!!!! is anything like relay or cables stacked?

Thank you for your time!!!!!
 

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rover_400_95_99
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Discussion Starter #2
Disappointed!!!

Hi to all members! I am disappointed that I don't have a reply on this and to be unable to find an answer even though I Google for it a lot!!

I found out also that even If I disconnect the oxygen sensor the voltage remains the same with the engine stopped!!! Is it a short circuit? I checked all the cables with my multimeter and they are ok!
 

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Tbh if you suspect the oxygen sensor, the easiest thing to do would be to replace it with a known good one (new or from another Rover) and see whether that sorts it. Unfortunately your car would be pre OBDII compatible to assist with the fault finding.
 

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rover_400_95_99
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Discussion Starter #5
Thanks!!!

Hello and thank you for your reply!!! The sensor is brand new but universal!!! With the previous one the car was like kangaro but with this one is stable! i put some resistance to the cable some ohms and now stays under 1 volt and it seems it is working in closed loop! the sensor works between 0.7 to 1 volt and goes under this when I depress and press again the acceleration! I wait to work and buy the bosch!!!
 

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Hello and thank you for your reply!!! The sensor is brand new but universal!!! With the previous one the car was like kangaro but with this one is stable! i put some resistance to the cable some ohms and now stays under 1 volt and it seems it is working in closed loop! the sensor works between 0.7 to 1 volt and goes under this when I depress and press again the acceleration! I wait to work and buy the bosch!!!
the universal ones ones are useless mate
 

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rover_400_95_99
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Discussion Starter #7
You are correct! I wait to work in the summer and buy the Bosch!!!
 

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Good luck with the new sensor. You could try a known good one off another car before paying out for a bosch one, or get one off a scrapped car (although I guess there are not many around where you are!)
 

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A damaged Cat will only cause the rear O2 sensor to switch which in itself will not have any bearing on fuel or emissions other Than bringing on the MIL lamp
 
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