ive got these codes...

[ian00uk]

oh yeh just a quick one.if i get the diverter valve will this bypass the error code that comes up boost pressure contol valve(n249):mechanical malfunction or the code 17705 pressure drop between turo and throttle valve(check d.v)

[inch]

sz m8 cud only find a test for code: 16684...hope it helps tho

 Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3
 Test box V.A.G 1598/31
 Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
 Diode test lamp V.A.G 1527
 Adapter set V.A.G 1594
 
Current flow diagram
Check conditions

● Engine speed sender must be OK,
● Fuel pump relay must be OK
● → Fuses 28 and 32 must be OK.
Test sequence

First check the activation of the injectors via final control diagnosis
Note:

To perform electrical check of No. 2 and 3 cyl. injectors/wiring, the manifold upper part must be removed.

If one or more injectors do not click:

Checking voltage supply

Pull connectors off injectors.
 
 
Connect diode test lamp to contact 1 and earth of relevant injector connector.
Operate the starter and check the voltage supply for the injector.
    The LED must light up
If the LED does not light up:

Switch off ignition.
Check wire between 2 pin connector contact 1 and fuel pump relay (J17) for open circuit using current flow diagram.
    Wire resistance: max. 1.5 ω
Checking activation and voltage supply

Pull connectors off injectors.
Connect the diode test lamp V.A.G 1527 to the connector contacts of the injector to be tested using adapter cables from V.A.G 1594.
Operate starter and check the activation for the injector.
    The LED must flicker
 
Note:

The flickering is difficult to see.

If the LED does not flicker:

Switch off ignition.
Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.
 
Check the wiring between the test box and connector for open circuit, short circuit to earth or positive using current flow diagram:
    Injector 1: contact 2+socket 96
    Injector 2: contact 2+socket 89
    Injector 3: contact 2+socket 97
    Injector 4: contact 2+socket 88
    Wire resistance: max. 1.5 ω
If no fault is detected:
 
Checking resistance of injectors

 Check resistance of injector between contacts.
    Specification: 14...18 ω
Note:

The resistance figures are valid for approx. 20 °C. At higher temperatures the resistance figures will increase.

If the specification is not attained:

Renew defective injector
Warning!
Fuel system is under pressure! Before opening the system remove fuse 28 and place a cloth around the connection. Then release pressure by carefully loosening the connection.


Erase fault memory to put learnt values in a neutral setting , Interrogating and erasing learnt values.
If the resistance values are OK and no wiring fault has been detected:

Renew engine control unit 

[ian00uk]

umm that sounds very confusing i dont get it lol

had forge diverter valve installed yest so will reset the codes and see what comes up

[inch]

nothing personal m8 ,but by just bypassing something dnt mean the main cause of ya fault shud be ignored,one bad fault code cud have been caused by another faulty component(s),thats y i posted the above bcus its a procedure to test the components for that code,no doubt thers another 2 procedures for ure other codes, after all testings dun ya shud av found yer main cause of ya fault..gl