Joeld Posted September 22, 2014 Share Posted September 22, 2014 Afternoon, Ive got a 57 plate 350, it's recently had a bank 1 O2 sensor 1 fault come on, that part has been replaced. I've now got a H02S Heater control circuit low bank 1 sensor 1 with a code of P0031 Any help would be much apprchiated as I have no idea.. Not sure if it's related but on idle it's struggling to hold a normal amount of revs and drops down to around 500 and obviously feels a bit ropey.. Cheers Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted September 22, 2014 Share Posted September 22, 2014 As your code P0031 would suggest, the issue is probably bank 1 sensor 1. What brand did you replace it with ? Alex. Quote Link to comment Share on other sites More sharing options...
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