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Scion xA/xB 1st-Gen Drivetrain & Power Engine and transmission discussions...

P0420 When It is Cold, No Code in Summer

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Old 12-04-2017, 07:43 AM
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Default P0420 When It is Cold, No Code in Summer

The check engine light along with the other two are on in my car. It always goes away when the weather warms up in spring. But in winter it mostly stays on.

No power issues, hesitation or rotten egg smell in exhaust.
When I start the car all I smell is raw gas from the exhaust till it warms up.

I read the code and the freeze frame data. The code usually sets when I drive at 60-70mph.

Any similar stories?

I do not feel it is a catalytic converter failure. Any ideas?

Last edited by MR_LUV; 12-04-2017 at 10:22 AM. Reason: moved to Correct Forum by Moderator
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