EVAP question
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4wd Low
Joined: Mar 2024
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EVAP question
Can the EVAP canister vent solenoid make a automatic transmission not shift properly? Shifts fine after warming up, but doesn't like to shift at all before it warms up. Check engine light came on and it's showing a code P0455.
Thanks.
Thanks.
Trailering
Joined: Aug 2025
Posts: 23
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A large evap leak can cause it to run so rough that it mimics a transmission problem.
Have you tried disconnecting the evap line to the intake to see if it runs differently? Also check the operation of the purge valve to make sure it's not stuck open.
Have you tried disconnecting the evap line to the intake to see if it runs differently? Also check the operation of the purge valve to make sure it's not stuck open.
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