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P0504 Diagnostic Trouble Code Discussion for October 2005

Brake Switch A-B Correlation Malfunction

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Trouble Ticket Help Requests for DTC P0504
Help Request Posted
2000 Pontiac Firebird Formula 5.7L Poor Idle Quality, Surge, Cuts out, Stall VIN: 2G2FV22G0Y
P0504: low idle. ... engine will stall. (Customer says he put a GT2 cam in this motor himself. And that it ran fine for almost a year...) When checking vacuum it starts out at around 18 and will drop to 10 where it levels off at until it stalls. You can smell all the unburnt f...
October 21, 2005