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Help needed : P0492 Secondary Air Injection system insufficient flow


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I read the codes with a OBDII scanner and got a P0492 Secondary Air Injection system insufficient flow.

My Cayenne S 2003 works fine overall, but it stalls at idle intermittently.

It happened a few times e.g. waiting at traffic light, moving slowly at traffic jam....etc, no noticeable pattern.

it stalls suddenlyonly at low speed, no problem with high speed.

any fix or relevant info would be much appreciated !!

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P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow

Possible cause of fault- Electrical fault in power supply or line between relay and secondary air injection pump- Secondary air injection pump relay mechanically faulty- Mechanical fault in electrical secondary air valve- Pneumatic secondary air valve faulty/sluggish- Electrical fault in secondary air injection pump- Mechanical fault in secondary air injection pump or secondary air injection pump blocked- Vacuum system leaking- Air hose to secondary air injection pump slipped off or constricted

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