P0491/2 + Misfires Problem

[JFP in PA]

Originally Posted by Lacostas

Hey folks, long time no see.

So ive done my research so far for my sudden Misfires: P0306, P0304, P0305,P0302 plus the SAI Codes: P0491,P0492

Ofcourse there is flashing CEL so i stopped driving the car..

I opened the engine cover and cannot see any hoses broken, so i may have to start checking deeper.

Is there anything specific i can check my chances? Since i cant drive the car and im on an island currently so the car would have to be towed back and forth in a ferry to get it fixed..

THANKS AS ALWAYS

P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow
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