ECU Trouble Code help needed

[joemrtz]

I have a 99 Legacy GT with the trouble code P0440 Evaporative Emission System. Does anybody know where the sensor is located on this vehicle?

I appreciate any help with my quest to find this sensors location.

Joe from 90815

 

[David (archive)]

I have a 99 Legacy GT with the trouble code P0440 Evaporative Emission System. Does anybody know where the sensor is located on this vehicle?

I appreciate any help with my quest to find this sensors location.

Joe from 90815

Try a new gas cap.

 

[GEO (archive)]

Try a new gas cap.

This code can really be a PITA ! It can be caused by a hole in the system as small as .040 in size. If a new gas cap does'nt work you may have to take it somewhere and have a "smoke generator" pump smoke through the system to find the leak.

GEO

 

[joemrtz]

This code can really be a PITA ! It can be caused by a hole in the system as small as .040 in size. If a new gas cap does'nt work you may have to take it somewhere and have a "smoke generator" pump smoke through the system to find the leak.

GEO

Thanks guys for the help! Great call! The tip makes absolute sense. Last year during my smog test I do recall there was an issue with the cap passing when it was tested, it did pass the test after the second try.

Joe from 90815