my engine light is on code 1423 car runs fine but need to pass inspection
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1997 BMW Z3 Question: check engine light
Answer #1Bret Bodas from RepairPal Test Shop, December 16, 2009, 15:08Master
This is the description of the code: P1423 80 Secondary Air System (Bank 1)
This is part of the air injection system, which helps to reduce exhaust emissions as the engine is warming up by pumping air into the exhaust system.
These systems have a check valve that can fail, as well as the air pump itself. The system will have to be checked and repaired to be able to get the check engine light to go out and pass inspection.