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B234F code 2-3-2 900 1991

uid 18886's pic
posted by  sdewolfe on  Thu Jul 5 01:25 CST 2007
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last visit: Mon Jan 31 05:56 CST 2011
[RELATED]

MiRo,

First, let me say I know nothing about the 940. But I do know how fuel injection works so my best guess:

If I read the list of codes correctly 2-3-2 is rich at idle. Two possibilities; either the O2 sensor is wrong or the car actually is running rich at idle. If you are certain you've got a clean air filter, etc., the quickest way to resolve that question is to replace the oxygen sensor; especially if it hasn't been done in several thousand miles.

Several possibilities exsist if the O2 sensor is good. One is an injector that is dribbling a bit more fuel than it should. This would create a relatively richer mix at idle than at speed. Another area to check is to make sure the idle air bypass is functioning. Any deeper than those checks will require more knowledge of the system than I have.
--
Mr. Shannon DeWolfe -- (I've taken to using Mr. because my name tends to mislead folks on the WWW. I am a 51 year old fat man ;-) -- KD5QBL






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