CEL on. Codes:P0410 & P1411

[cbarnes]

Originally Posted by mikefocke

and it will help you understand the system and the steps you can take to diagnose the problem.

Link

Something you bumped or disconnected in the process of installing your cats?

First suspect is always something you touched last.

I will take a look at the site. I did recently a few months back clean the mass air flow sensor. I do have a cold air intake installed.

Thanks!

[saturk]

Same problem with a 01 S. Followed the various remedies suggested on the blog. Clearing the CEL after each attempt. Solutions included replacing gas cap and cleaning the MAF. Then the light was back, same codes. With 89K+ miles and limited mechanical skills, it was off to the indy shop --- scan showed seized secondary air solenoid and bad combi valve. They were replaced and a cracked vacuum canister was detected. Replaced too. Total costs, just shy of $775. 3K miles later, still no CELs and the grins get better.

[vath2001]

My research shows it is the change over valve and/or the cut off valve that need replaced. Common item to fail in these cars.

996-605-123-01-M244 Change-Over Valve for Air Injection, 993 Carrera 2/4 (1996-98), $23.50 Pelican parts
993-113-245-01-M100 Cut-Off Valve for Air Injection, 993 Carrera 2/4 (1996-98), Each , $104.75 Pelican parts

The only reason I have not changed mine is that the cut off valve is under the intake manifold and I haven't figured out how to do it. So I've been driving with the CEL on. It may be a winter project.

[cbarnes]

Originally Posted by saturk

Same problem with a 01 S. Followed the various remedies suggested on the blog. Clearing the CEL after each attempt. Solutions included replacing gas cap and cleaning the MAF. Then the light was back, same codes. With 89K+ miles and limited mechanical skills, it was off to the indy shop --- scan showed seized secondary air solenoid and bad combi valve. They were replaced and a cracked vacuum canister was detected. Replaced too. Total costs, just shy of $775. 3K miles later, still no CELs and the grins get better.

You wouldn't happen to have those part numbers? How much of it was labor? If I could look up parts, I then can find cheaper on line and have my local Porsche dealer parts guy match the prices. Did you car ride different and make some engine type noise behind your seat before this was fixed?

[Dave928]

it also could be just the vac lines to the combi valve are bad...

[cbarnes]

So I have had it checked out and they told me that the air pump is bad and cost around $1,200 for this part. Does anyone know where to get one of these cheaper? Also, they said to change the air inject check valve and air pump cut off valve. Anyone have these parts that work and they want to sell or know where to find cheap???

[Gubu986]

Originally Posted by cbarnes

So I have had it checked out and they told me that the air pump is bad and cost around $1,200 for this part. Does anyone know where to get one of these cheaper? Also, they said to change the air inject check valve and air pump cut off valve. Anyone have these parts that work and they want to sell or know where to find cheap???

Pelicanparts.com
rockauto.com

[cbarnes]

I had my mechanic replace the air pump and my cel problems went away. Light is off. Got the part used at a great price from. Waiting to see if I need the other parts.

http://www.oklahomaforeign.com/