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  1. #11
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    the misfire problem was resolved. im still using same O2 sensors. could a misfire damage a sensor?

  2. #12
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    I have had car for 2 years. I had a mis fire problem in March this year which was fixed. Got a P0430 code after - managed to get replacement cat for bank2 from on line breakers in England. This was replaced - old cat in bits inside, everything ok for few months until I got P0420 dtc. Replaced cat on bank 2 with another one from breakers - still getting same code and wondering if O2 sensor problem?
    Jaguar X Type 2.1 Sport Petrol

  3. #13
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    Car had misfire which was fixed. Cat on bank 2 had to be replaced - inside was in bits! Cat taken out of bank 1 and replacement cat from breakers both appeared to be ok - inner part ok no breaks or melting, no discoloration, still using same o2 sensors though. would a fauly o2 sensor generate fluctuating voltage? I viewed this using my OBDII scanner.
    Jaguar X Type 2.1 Sport Petrol

  4. #14
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    What will this prove TT?
    Jaguar X Type 2.1 Sport Petrol

  5. #15
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    Tanis - thanks! the cat I removed on bank 1 and the one I replaced it with from breakers both appeared to be ok - the inner honeycomb brick was clean and in one piece, no melting, no discoloration. I'm still using the original O2 sensors. It would be odd i feel for the same fault code to remain - this is why I think it may be a O2 sensor possibly upstream. I had a problem with the bank 2 cat on the car which was replaced after a mis fire fault was fixed, but this problem with the bank 1 cat only materialized months after.
    Jaguar X Type 2.1 Sport Petrol

  6. #16
    Senior Member
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    Mar 2009
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    Quote Originally Posted by TMan View Post
    this problem with the bank 1 cat only materialized months after.

    That is quite normal. The damage/decay 'grows' gradually.

  7. #17
    Senior Member
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    Nov 2012
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    Quote Originally Posted by TMan View Post
    What will this prove TT?
    Quite simply it will prove if the CAT is faulty or the sensor.

    if you move downstream bank 1 sensor to bank2 and bank2 to bank 1

    If the fault moves to bank 1 then the sesnor or wiring is fault.
    if the fault stays on bank 2 then the CAT is fault.

    TT

  8. #18
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    Nov 2012
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    It took about 3 months for my undersize galaxy cat to flag a MIL, now does it about 30 miles after every clearing. Been like it for 3 years , i keep thinking of buying the type aproved replacement ( the part numbers end in H) but never get round to it.

    TT

  9. #19
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    thanks TT but what if the problem is with the upstream sensor on bank 1 and both downstream sensors are ok?

  10. #20
    Senior Member
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    Nov 2012
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    You would highly likely have a fault(s) code for the upstream sensor,

    You would most likely see mention of fuel trim issues on the bank, Hego faults and you would probably also experience poor running and reduced economy.

    Monitor the pre-cat hegos and see how soon the car enters closed loop running,

    TT

    TT


 
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