william81uk Posted February 1, 2012 Share Posted February 1, 2012 got this faults with my mk3 1.8 mondeo went to my car breakers and got two sensors put them in and reset my ecu and still the same can any one help me please PO135 oxygen sensor heater circuit malfunction in bank 1 sensor1 PO141 02 Sensor Heater Circuit Malfunction (bank 1 sensor 2) Quote Link to comment Share on other sites More sharing options...
Podzak Posted February 13, 2012 Share Posted February 13, 2012 Sorry m8 but we need more info. What was the initial fault? Quote Link to comment Share on other sites More sharing options...
Z3 MON Posted February 15, 2012 Share Posted February 15, 2012 without knowing the original symptoms we cannot help much. but depending on your millage/age of car. it is possibly that it needs a new CAT? as this looks like an emmisions problem but we need to know what the reall issue was to begin with. Quote Link to comment Share on other sites More sharing options...
mintalkin Posted February 15, 2012 Share Posted February 15, 2012 i would never get sensors from a breakers as they may been worst than the ones which are being replaced. Quote Link to comment Share on other sites More sharing options...
Z3 MON Posted February 15, 2012 Share Posted February 15, 2012 i would never get sensors from a breakers as they may been worst than the ones which are being replaced. 100% agree Quote Link to comment Share on other sites More sharing options...
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