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Some ideas to check (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Wayne McKay on April 28, 2002 at 11:29:07:

In Reply to: new o2's but still get check engine. posted by oat on April 28, 2002 at 08:00:01:

1) reversed wiring to sensors (.e. left to right)?
2) wiring to sensors no good?
3) O2 relay not triggering heating elements?
These can all be diagnosed with a volt meter on the sensor output wiring. Speak up again if you need some help with that.

'88 750iL

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