PupC

Hi all,

Looking for some pix of vacuum lines etc to daignose, P0491-Secondary Air Injection System Bank .

Fuse is good... Can clear fault comes back in 2-3 weeks, seems like after hard acceleration but cant swear to that..

Runs smooth, pulls strong, no issues at all.. CEL just bugs me and I need to fix this...

Thanks

Pup

(YES , I did a search)

99firehawk

Next time you cold start pull the hose off the bank one air pump. Start the car, how much air comes out. Should feel and sound like a leaf blower, if it does your lucky you only need the mechanical valve. There are no vac lines on a cayenne the valve is opened by the pressure from the air pump. Usually the valve sticks and the exhaust comes back up and kills the pump.

PupC

Thankyou for the reply!

I'll give it a shot!

Pup