Hi,

I'm new to vehicle diagnostics so forgive me if I'm asking the obvious but can anyone shed any light on what might be causing  a " P0413 - Switching Valve A circuit open "code to be constantly reoccuring please ? Having read the forums I removed my secondary air pump ((and nothing else )before it fell to pieces and  inserted a resistor and all was well for a few weeks. It then started showing  a CEL  on a regular basis so yesterday I replaced the resistor with a new one but the CEL came up immediately again. On scanning, it showed  the same P0413 code as before,  is there anything else that would trigger this, apart from the obviouly missing air pump ?  All advice gratefully received.

This may be of help, couple of sources of info for you -

 

http://forums.vwvortex.com/showthread.php?4442446-engine-code-p0413

 

http://engine-codes.com/p0413.html

Kentphil 1,

Thanks for the response, much appreciated. Are you aware whether the SAI pump can be coded out using VCDS or not ?

As far as I am aware, that is a mapper/ecu repairer only option, I've certainly never found the option in VCDS, unless anybody else knows different.

Thanks, was considering that as a last resort. Appreciate the earlier pointer, had a close look and I've discovered that the N112 solenoid had become disconnected so fingers crossed that is the solution. Once again, appreciate the response.