I recently purchased a 97 toyota camry for work to try to save gas but check engine light came on I used scanner to dianose and it gave me code p0401 the car runs really smooth I changed egr valve but a day later light is back on and I. Noticed my eyes have been getting irritated don't know if its related to my problem when. The only thing I've noticed with vehicle is when its cold and I turn vehicle on it starts then turns off so I have to accelarate it for a few seconds is this related to the p0401 can someone please assists I need to smog vehicle to