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P1540 Diagnostic Trouble Code Discussion for March 2008

Air Conditioning Refrigerant Over-Pressure - Air Conditioning Disabled

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Trouble Ticket Help Requests for DTC P1540
Help Request Posted
2002 Mazda Millenia S 2.3L Cuts out, MIL Lamp on VIN: JM1TA22292
P1540: Air Bypass Valve System. ... they found and replaced burnt down cat converter. Came in with misfire code. Checked and found low compression on #3 and #5 cyls. Did valve job and replaced pistons and now compression good and vehicle runs great with no more misfire. However when drive ve...
March 17, 2008