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Old 10-29-2009, 08:34 PM   #5
OldNuc
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Join Date: Apr 2008
Location: Far Southwestern Iowa
Posts: 66,693
 

1998 SC2
Default Re: P0141 Code Will Not Go Away!

In the socket that the rear O2 sensor plugs into check for the presence of 12vDC with the key on. The heater power is on the pink and dark green wire. The heater current is controlled by the PCM through the dark green wire. The pink wire is direct from teh UHJB and is the 12vDC + power source. There are 2 tan wires and a black/white wire located on teh rear left end of teh block above the starter and just below the intake manifold. Verify that both tan wires are connected. These are the PCM grounds for the O2 sensors.
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