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P1540 Diagnostic Trouble Code Discussion for April 2004

Air Conditioning Refrigerant Over-Pressure - Air Conditioning Disabled


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Trouble Ticket Help Requests for DTC P1540
Help Request Posted
1996 Mazda Millenia S 2.3L MIL Lamp on VIN: JM1TA2229T
P1540: Air Bypass Valve System. ... Millenia comes in at about 2500 rpm only after the TCS light comes on, followed by the TCS off and MIL lights. My main problem is that I'm not sure how the TCS module and ECU work together. I've watched the duty cycle of both the ABV solenoid vent valve an...
April 14, 2004