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Hi All,

Having recently purchased Vag com slowing getting my head around it but need a little advice on a couple of faults that i have found.

The only Mod i have and it may cause it?? is a K&N Panel filter.

Faults are as follows ( Thanks in advance )

Address 01: Engine Labels: 077-907-558-BCY.lbl
Part No: 4D1 907 558
Component: 4.2l V8/5VT G 0004
Coding: 0010752
Shop #: WSC 02195 785 00200

3 Faults Found:
17861 - Exhaust Gas Temp Sensor 1 (G235): Open or Short to Plus
P1453 - 001 - Upper Limit Exceeded
17831 - Secondary Air Injection System; Bank 1: Insufficient Flow
P1423 - 002 - Lower Limit Exceeded - Intermittent
17819 - Secondary Air Injection System; Bank 2: Insufficient Flow
P1411 - 002 - Lower Limit Exceeded - Intermittent
Readiness: 0000 0000

Looks like the Secondary Air Injection Pump isnt working or there is a huge leak in it.
Clear the codes and see what comes back in a couple of days\cold starts

Yeah just cleared them, will be back with an update as soon as.

is this something that can be changed or fixed easily enough?

There's a filter in the SAP that you can remove and clean. This might help. Also check the tubing. More worrying is the EGT sensor, but this may be a side-effect of the secondary air problem.

ERR ok SAP?

whats that...

The Car doesnt miss a beat, if it wasnt for the warning light that came on i would be none the wiser,

Secondary Air Pump. It's the large pierburg thing in the front right side of the engine bay. The cover unclips and you can wash the filter.

If that doesn't fix it you could also check the N112 valve, too.

Thanks so much, great help,

will defo wash the filter and see,

XS-POWER wrote:Thanks so much, great help,

will defo wash the filter and see,

Had the same issues with mine about a month ago. both the air pump and solenoid where fine. In the end it turned out to be the small vacuum tubing that controls the combination valves which comes from solenoid N112 (Item 5)
Had just read this post and order up the tubing when I got the error codes. http://rs246.com/index.php?name=PNphpBB ... ght=tubing

For physical location of the N112 and the secondary air pump, see this photo:

(the secondary air pump is visible on the far left about a third up from the bottom.

Thanks very much for the info,