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Jaguar S Type 3.0 Petrol 2005 - Code P0414 secondary air injection system switch - Fixed #

Posted by Peter Holland on October 23, 2014, 5:14 pm

Year of Manufacture *: 2005
Engine Size and Code *: 3000cc
( Optional ) Scanner Used: Various! Auto Enginuity
( Optional) Fault Codes: P0414

A bit of a brain teaser this one. Its come in with the engine light on with code P0414 - secondary air injection system switch valve A circuit. I'm having a lot of trouble reliably reading this car so I'm a bit dubious of the descriptions accuracy. I don't think the car is fitted with a secondary air injection system at all!

I've done some research on this without much sucess other than someone mentioning that this problem was caused by the wiring loom behind the front bumper getting damaged confusing the ECU. I know the X types have a lot of loom issues but does this apply to the S types as well?

Re: Jaguar S Type 3.0 Petrol 2005 Code P0414

Posted by andyhyoung <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5148' width='330' height='300' border=0 style='border:none;'> on October 23, 2014, 6:15 pm, in reply to "Jaguar S Type 3.0 Petrol 2005 Code P0414"
Andrew Young

I have seen many faults due to bad wiring behind bumper.No horn,no heater valve operation,no wipers etc,but not this one specifically.Certainly worth removing bumper for inspection.

Fixed #

Posted by Peter Holland on October 31, 2014, 12:33 pm, in reply to "Re: Jaguar S Type 3.0 Petrol 2005 Code P0414"
Edited by board administrator November 5, 2014, 9:05 am

I've just had this car back in to remove the front bumper and inspect the loom. With the bumper off, I found that it did have secondary air injection as the air pump is below the n/s headlamp. I followed the air pipe across the front of the engine and found a vacuum operated valve. The actuator that controls this valve had rusted and split. Horrid to get to as its mounted on a bracket attached the front of the engine just above the sump. Anyway, £10 actuator has now cured the fault. Happy days!

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