Question about BMW 323
HI. your code definition is below with the possible causes as well.
Trouble Code: P01421
Secondary Air Injector Valve Circuit Short to Ground
Connector to the secondary air injection valve is loose or disconnected
Secondary air injector valve circuit shorted
Secondary air injector valve circuit is open(inoperable)
Faulty secondary air injector valve
Replacing this failed component will fix this issue.
Posted on Aug 01, 2009
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Posted on Jan 02, 2017
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