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P1412 Diagnostic Trouble Code Discussion for June 2005

EGR Vacuum Regulator Solenoid Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1412
Help Request Posted
2000 Land Rover Discovery Series II 4.0L MIL Lamp on VIN: SALTY1540Y
P1412: Secondary Air System Fault B1 signal implausible. Greetings! Disco has MIL on for P1412: secondary air system. Alldata is sketchy on this one. I ran tests as specified in Alldata, but now need to run the "Secondary Air System Diagnostic" test. I don't have access to a "Testbook", LR's answer ...
June 21, 2005