Evap system

Asked by John Apr 09, 2016 at 11:36 PM about the 2004 Pontiac Grand Prix GT1

Question type: Maintenance & Repair

Can outside temperature affect any component of
the evap system to set off check engine light on
cold start or anytime

4 Answers
157,435

Bob answered 8 years ago

Outside temperature can affect almost anything electronic or mechanical. Check the gas cap first then move on to the Evap system.

Mark helpful
9,275

Dorian answered 8 years ago

The evap system diagnostic is only enabled at ambient temperatures of 40F or above. If a component went bad over the winter, it could just now be showing up due to warmer weather.

Mark helpful

Your Answer:

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