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P1421 BMW - 328I (1997) wHAT DOES THIS MEAN

My 1997 BMW 328i engine light trouble code P1421. What does this mean

Vehicle: 1997 BMW 328I V-6 Engine
asked Sep 25, 2014 by Cal

1 Answer

P1421 Secondary air injection

This is the secondary air injection system, check the operation of the secondary air pump, this code condition is usually a failed air pump,
answered Sep 26, 2014 by Reynaldo (10,835 points)

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