engine light stays on, does not flash. The code is for vacuum system failure. Not sure if it is in hoses or in vacuum pump. How do I determine ? Car runs well, heater/air conditioner runs well. Short of expensive trip to dealership I could use some ideas
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2003 Ford Taurus Question: How do I determine if vacuum leak is in system or bad pump
Answer #1DaveJHM October 12, 2010, 01:20Master
Do you mean Evaporative Emissions system issues - like P0455 P0456 P0457,that sort of thing?
Answer #2wrenched October 12, 2010, 10:46Technician
I could be as simple a your gas cap not sealing also. Put some vasoline on it and make sure it's tight.