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Alex Armfield
Alex Armfield, ASE Certified Technician
Category: BMW
Satisfied Customers: 141
Experience:  8 years professional experience, Have owned 30+ bmw's
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P1421 p1423 what does it mean

Customer Question

p1421 p1423 what does it mean
Submitted: 8 years ago.
Category: BMW
Expert:  Alex Armfield replied 8 years ago.



i'll try to help you here


on your car, those codes mean the following:


p1421- Secondary Air Injector Valve Circuit Short to Ground

p1423- Secondary Air Injection Bank 1 Flow Too Low


these codes usually show up together indicating that the secondary air pump has failed. This part is the blower under the hood on the passenger side that runs when your car first starts up.