P0420 code

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Thrusty
Regular Member
Posts: 44
Joined: Fri Nov 06, 2015 11:23 pm

P0420 code

Post by Thrusty » Sat Dec 16, 2017 7:23 am

I know this has been discussed a little but wanted some fresh ideas if anyone had any. Got 0420 this morn (cat below efficiency) I recently moved to a cold climate from a hot desert... I noticed my car doesn't get up to operating temp on my short 7 mi drive to work now that its winter. Doesnt go past 170deg F. Think that triggered the code? I reset the light and will continue to monitor....


mikeincanada
Regular Member
Posts: 43
Joined: Fri Sep 25, 2015 8:16 am

Re: P0420 code

Post by mikeincanada » Mon Dec 18, 2017 11:32 am

These vehicles do take a long time to reach operating temp in winter. I find it best to let the engine reach full temp before driving.
The P0420 code is often gas cap/evaporative related.

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