Our 91 240 has had an issue for the past few months.
I get a 212 O2 sensor code and check engine light on though the O2 sensor
is relatively new. I've check the connections at O2 sensor and AMM and cleaned AMM connectors. When it first happened a couple of months ago I seem to recall
reading about the preheat and #4 fuse so I replaced the fuse and pinched the spades together as fuse seemed to be loose. The check engine light went out and the car ran fine. A couple of days later the problem returned however.
The car will start fine and run fine for about the first minute and then gets bogged down and has no power, after another minute or two power returns and car runs completely fine from then on.
I'm due for CA smog test soon so need to take care of the issue.
Any help would be greatly appreciated.
thanks, Kirk S.
sorry about the double post, couldn't log in before.
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