P0491 Suzuki Secondary Air Injection System Insufficient Flow Bank 1
Possible causes
– Secondary air pump with no or low air flow
– Secondary air bypass solenoid leaking /blocked or stuck open /closed
– Secondary AIR air hose restricted
– Secondary air vacuum hoses restricted or leaking
– Secondary air bypass solenoid leaking /blocked or stuck open /closed
– Secondary AIR air hose restricted
– Secondary air vacuum hoses restricted or leaking
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0491 Suzuki Description
The secondary air system detected that there was insufficient mass flow change during pump switching (on/off)
Suzuki Vehicle:Suzuki XL7,Suzuki Kizashi,Suzuki Escudo,Suzuki SX4,Suzuki Wagon R,Suzuki Alto,Suzuki Cervo,Suzuki Cappuccino,Suzuki Fronte,Suzuki Grand Vitara,Suzuki Ignis,