PROBLEM CODE PO412

  • Tiny
  • james giles
  • 2000 Buick Regal
  • 120,000 miles

How do I check for the problem code po412 and where is the location of the air injection pump relay control circuit in a 2000 Buick regal 3.8 v6

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Thursday, October 4th, 2012 AT 1:01 AM

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  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

Attached are instructions for the two diagnostic codes and troubleshootting them. I have included the PCM wiring diagrams that they refer to. The diagram, 2of4, has the secondary air injection system in the top right of the diagram.

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Thursday, October 4th, 2012 AT 1:16 AM
  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

Clear

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Friday, October 26th, 2012 AT 9:35 AM

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