Drive cycles

Tiny
PETER ANDRULIS
  • MEMBER
  • 2001 AUDI A4
  • 1.8L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 181,000 MILES
I replaced the evap solenoid as it was throwing a code. Now that I erased the code, and the Autel519L shows all lights green and sent a test message to the ECM, how long do I drive it to make sure its working correctly and that the repair was correct?
Saturday, May 16th, 2020 AT 8:21 AM

5 Replies

Tiny
STEVE W.
  • MECHANIC
  • 14,522 POSTS
If it is showing all of the readiness monitors complete including the EVAP test you should be good to go. That one should have the IM button that shows the tests. X means they haven't run, green check means they have.
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Saturday, May 16th, 2020 AT 10:20 AM
Tiny
PETER ANDRULIS
  • MEMBER
  • 25 POSTS
It's my observation that the old evap solenoid was the original or maybe a replacement that predated my ownership, maybe 5 years old. I couldn't blow through it, so that part worked still, but it threw a code and it seems like it may have just electronically malfunctioned which the new one now replaced. Does the electronics fail sometimes and not the rubber diaphragm inside?
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Saturday, May 16th, 2020 AT 3:31 PM
Tiny
STEVE W.
  • MECHANIC
  • 14,522 POSTS
The coil can burn out or they can stick closed as well. Multiple failure modes. It could even be a bad connection that the process of removing and replacing can clean enough that it works. The normal test is to use a scan tool to signal it open and closed if it works you have control over it and it is working. To test without a scan tool you apply battery voltage to the two contacts and see if the valve cycles open and closed as you apply and remove the power feed.
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Saturday, May 16th, 2020 AT 3:45 PM
Tiny
PETER ANDRULIS
  • MEMBER
  • 25 POSTS
Well in any case, the new one seems to work without problem, obd2 reader shows all things check ready to go with green check mark.
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Saturday, May 16th, 2020 AT 5:20 PM
Tiny
STEVE W.
  • MECHANIC
  • 14,522 POSTS
Sounds like it's working. Good to hear. Thanks for using 2CarPros.
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Saturday, May 16th, 2020 AT 6:50 PM

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