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P1540 Diagnostic Trouble Code Discussion for January 2005

Air Conditioning Refrigerant Over-Pressure - Air Conditioning Disabled


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Trouble Ticket Help Requests for DTC P1540
Help Request Posted
1998 Subaru Legacy 2.5L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S3BC6858W
P1540: Vehicle Speed Sensor Signal Circuit Malfunction. hello subaru experts-we installed a customer supplied engine-the other engine overheated and blew-installed the supplied engine and i drove it 30 miles with no problems- let it sit for awhile-restarted the engine to double check things before giving it back to...
January 08, 2005
1998 Subaru Legacy 2.5L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S3BC6858W
P1540: Vehicle Speed Sensor Signal Circuit Malfunction. hello subaru experts-we installed a customer supplied engine-the other engine overheated and blew-installed the supplied engine and i drove it 30 miles with no problems- let it sit for awhile-restarted the engine to double check things before giving it back to...
January 10, 2005
1997 Mazda Millenia S 2.3L Hesitation VIN: JM1TA2227V
P1540: Air Bypass Valve System. Hi all, This car is a tough one. Car came in with complaint of No Power when engine warm. Took car for a 15 minute test drive car runs good. Pulled car into shop and hooked up scanner had multiple codes in system. Cleared system & took car on a longer test...
January 11, 2005
1998 Subaru Legacy 2.5L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S3BC6858W
P1540: Vehicle Speed Sensor Signal Circuit Malfunction. hello subaru experts-we installed a customer supplied engine-the other engine overheated and blew-installed the supplied engine and i drove it 30 miles with no problems- let it sit for awhile-restarted the engine to double check things before giving it back to...
January 08, 2005
1998 Subaru Legacy 2.5L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S3BC6858W
P1540: Vehicle Speed Sensor Signal Circuit Malfunction. hello subaru experts-we installed a customer supplied engine-the other engine overheated and blew-installed the supplied engine and i drove it 30 miles with no problems- let it sit for awhile-restarted the engine to double check things before giving it back to...
January 10, 2005
1997 Mazda Millenia S 2.3L Hesitation VIN: JM1TA2227V
P1540: Air Bypass Valve System. Hi all, This car is a tough one. Car came in with complaint of No Power when engine warm. Took car for a 15 minute test drive car runs good. Pulled car into shop and hooked up scanner had multiple codes in system. Cleared system & took car on a longer test...
January 11, 2005