P1421 NISSAN -

Question

I have this code P1421 for my 08 Versa but there is no evident impact to the performance or even to the mpg's of the car. Should I really worry about the code? Or what should I do?

Answer 1

P1421 Cold start control

 This is for cold start here is how it works The ECM controls ignition timing and engine idle speed.When the engine is started with pre-warm up condition this helps the catalytic to reduce emission.

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