Mechanics

HOW DO I CHECK FOR THE PROBLEM CODE PO 412 AND WHERE IS THE LOCATION OF THE AIR INJECTION PUMP RELAY CONTROL CIRCUIT IN A 3.8 V6

2000 Buick Regal • 120,000 miles

Computer is giving me two readings of po 412 and po 418. Need to know what to do in order to get car running to proper standards
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James giles
October 4, 2012.



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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