Hi Everyone,

First time posting on the forum, ive read a lot about my issue regarding power loss on the forum and unfortunately,
still no luck, what I have done so far with the car to fix the problem was , 1. done a complete services,
2.changed the (MAF) 3.Diagoned the car with Diagnostic tool and it came up with (n75) had problem Replaced it still no joy,
now I input the diagnostic tool again and these are the codes that came up

P1441 EGR VALVE (N18), OPEN CIRCUIT OR SHORT GROUND :SPORADIC,

P1588 ENGINE MOUNT SOLENOID VALVES(N144/N145), OPEN CIRCUIT OR SHORT GROUND :SPORADIC,

P1156 MANIFOLD PRESSURE SENSOR (G71) OPEN CIRCUIT OR SHORT GROUND :SPORADIC,

P3105 VALVE FOR INTAKE MANIFOLD FLAP (N239), OPEN CIRCUIT OR SHORT GROUND :SPORADIC,

Can anyone please shine a light on these but mostly the n18 for at I think the culprit,

WHERE IS THE (N18) VALVE LOCATED IN THE AUDI A4 1.9TDI B6 ALL I KNOW ITS NEAR ENOUGH IDENTICAL TO (N75)


ANY HELP WOULD BE MUCH APPRICIATED.