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Still having problems with a jaguar 2.7 diesel reg: ce58gop…

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Hi Richard,still having problems with...
Hi Richard,still having problems with a jaguar 2.7 diesel reg: ce58gop
Make/Model: Jaguar/Xf
Engine: 2.7 L
Fuel: Diesel
Year: 2009
BHP: 207
Engine Code: AJD7G
VIN: SAJAC061297R34498Previous diagnosed by someone else,i replaced the egr valves with the cheap ones from euro car parts as per customer request booking via click mechanic.car would only run in limp mode at this pointafter replaced them eml light went straight off without reset from diagnostic machinei then plugged in anyway and did the set up adjust for adapting new parts on my snap verus pro machine but this failed on my machine and just come with error.....depsite this drove the car all fine, 2 weeks later customer calls he says dsc light on car goes into limp mode, came out to look at the car but was fine no light on checked wiring all okFault code: p0490 - egr valve circuit A high (stored) in engine ecuchecked on live data and osf egr valve flap had permanent 5% deviation this would never change where as the nsf would vary between -10% to +50%reset this and told him to try it again, again was driving fine no fault codes etc....all ok for 2 weeks but thennow light has come back on again (limp mode // dsc ) but this time it states same code but only says'' circuit high'' not circuit A highdo u think this is because the egr valves are cheap ones and car needs proper jag parts?or is something else
Submitted: 7 months ago.Category: Jaguar
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Answered in 28 minutes by:
12/5/2017
Jaguar Mechanic: Richard, Jaguar Technician replied 7 months ago
Richard
Richard, Jaguar Technician
Category: Jaguar
Satisfied Customers: 15,769
Experience: 12 years at a Ford/Lincoln Mercury and Jaguar dealer as technician and shop foreman.
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Right now what are the stored fault code numbers?
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Customer reply replied 7 months ago
just p0490 - nothing else
Customer reply replied 7 months ago
do you think this is because the map sensor is not seeing a change in pressure on the osf egr?
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