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OK, what the heck is this all about???
Posted by Evil Twin Skippy (more from Evil Twin Skippy) on Sat, 26 Jun 2004 15:30:42
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Hello all,
I have been hunting for a warm start rough idle/no power issue in my '89 9kS auto.
So, one of the CEL codes I have been getting is 12224 (rich mix). Bentley says to also reference 12225 (O2 sensor/pre-heater) on the LH 2.4. So I did. I managed to be able to check the O2 while it was actually doing it's trick. The pre-heater circuit and resistance are fine, but...
the O2 was putting out over 4 Volts when I started the car!!! It steadily worked it's way down to the point where it was fluctuating from 1.4-.6 volts, which is still WAY rich.
I am assuming this is all to do with a bad O2 sensor. Is there anything else that could be causing this?
TIA
ETS
posted by 64.94.1...
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