Hi can someone point me in the right direction iv got a vauxhall zafire b mkll and my engine management light come on so I went and ad it check and the code was p0171 bank 1 running lean so he sed your oxygen sensor so I got a bran new one and put it on about a month ago and yesterday it's my engine management light back on with same code agen any help would be great thanks
Diagnostic trouble codes (or fault codes) are obd2 codes that are stored by the on-board computer diagnostic system. These are stored in response to a problem found in the car by the system. These OBD2 codes are stored when a sensor in the car reports a reading that is outside the normal/accepted range (Eg: fuel mixture too rich). . 769 951 234 692 434 729 955 158