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07-19-16, 05:45 AM

Is3hunna70

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Help

So yesterday my is300 got a random Cel so I got the codes and it is P0171 p0174 and p0430 . the car still runs perfect . Funny thing is the next morning I go and turn car on and no more cel . Has anyone had this problem before ? Should I be concerned ?

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07-21-16, 09:34 AM

IcyBishop

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That's for the emissions, right?
Could be an O2 sensor or something simple like a vacuum hose disconnected or rotted from the intake.

Have the codes come back?