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bad O2 sensor?? 700

uid 48709's pic
posted by  shegarty on  Tue Sep 6 06:18 CST 2011
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last visit: Mon Dec 19 08:19 CST 2011
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hi all - the CEL is on in my '90 740 2.3T - fault codes in position 2 read 2-2-1 and 2-3-1, fuel trim too lean or rich at part load - she has been running like this for several months now (two kids, full time job and home renos - no time for the car!) with no running issues, starts, idles and runs great and gets the same gas mileage (25-29 mpg) as she always has

my thought is that there is probably faulty connections/wiring somewhere that is generating the trouble code - the problem is that she is due for an emissions test here in ontario next month and most places won't test it if the CEL is on - should i start replacing parts, O2 sensor?? AMM?? fuel pressure regulator?? any insights are always appreciated :)
--
90 740T wagon, 94 850 T5 wagon






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New bad O2 sensor?? [700]
posted by  shegarty  on Tue Sep 6 06:18 CST 2011 >


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