Bosch 4&3wire sensor

Doug Robson doug at cia.com.au
Thu Nov 7 21:43:27 GMT 1996


Hi in a 4 wire O2 sensor you have sensor gnd, earth, heater =ve, and
signal
in a 3 wire heated is it common ground, and there fore will it upset my
autronic SMC if i use the chassis ground effectively for both for this
function. if i then conect sensor ground to chassis will this upset
things????

have plenty of 3 wire ones free, 4 wire ones 350 dollars


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