I have a 12/88 toyota pickup 2.4 engine.I am getting a code 21(o2 signal) which I feel will be the o2 sensor. Im also getting a code 51 switch signal witch I need help with. Alldata shows a code 51 for a 1988 but not a 1989. Alldata does not give a diagnostic ...

FIX posted 6/26/2008

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