2000 Buick Regal Repair Question
Topics covered: Wiring, Wiring diagram.
Mileage: 120,000 miles.
Mileage: 120,000 miles.
Asked on October 4, 2012
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
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
Asked by james gilesAnswer
Replied on 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.
