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The O2 sensor wire colors are as follows:

Purple or Purple/White- sensor input to the pcm, or computer

Tan or Tan/White- sensor return (common) to the pcm

Pink or Brown- 12V ignition power to the O2 sensor preheater

Black or Black/White- 12V common or ground return to chassis for O2 sensor preheater.

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โˆ™ 2012-01-25 16:34:47
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Q: What are the oxygen sensor wire colors for a 2001 4.3 Chevy thunder?
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