Well I got a check engine light yesterday and had onstar run a diagnostic and they came back with the code p0453 which is Evaporative Emissions Control System Pressure Sensor High Input and when I talked to the onstar diagnostic tech he said something about it detecting a high voltage but it corrected it self and is no longer active so the light should go off in the next 3 or 4 days. It was off this morning when I went to work so I thought it was good. Got off work and started car and light was on again. contacted onstar again and same code. they said give it a week and if it's still on then take it to the dealer.
Anyways I was wondering if anybody else has had this code or what they think I should do. Thanks.
Here's a link to a website I found from google.
http://www.obd-codes.com/p0453