codes read please help

[tomt 59]

hi everyone since i last posted my car has returned back to its old ways loss of power takin ages before turbo cuts in just not good had to local garage to put on the computer 2 faults again 1st fault code 17965 saying charge pressure control intermittent 2nd 17978 engine control unit blocked .he was going to try and find out more about codes today can any 1 help with codes plain english please vw people

[Crasher]

The turbo control vanes are jammed. Remove, striping and clean the turbo exhaust housing and vanes or use the Innotec turbo clean system which does work in some cases.

[tomt 59]

cheers crasher does it need n75 valve as well or just turbo cleaned and do most garages use innotec clean system how much to strip turbo and clean

[Crasher]

N75 valve failure is no where near as common as turbo vane jamming. The Innotec process takes about three hours to do and the kit is normally sold at around £50. On top of this a new turbo outlet gasket and nuts are required.

[tomt 59]

cheers crasher been back to local garage today they say they have not had time 2 check codes on computer bloke says he reckons he would change air mass meter and turbo ok i give him all info i can find on this site iam not confident with garage or car its a shame i have kept vw for years thanks agian

[Crasher]

A failed AMM can generate code 17965 and it is worthwhile starting there. Make sure he fits a genuine VAG exchange AMM bought from a VW dealer or TPS.

[tomt 59]

thanks very much lets hope we strike it lucky

[tomt 59]

hi everyone had airflow meter changed to day it has made no difference does any one no what change next codes say 17965 charge pressure control and 17978 engine control unit blocked does computer have to clear codes after new meter was fitted

[Crasher]

Sometimes they won’t react to a new AMM until the codes are cleared. Is the loss of power permanent or does it clear each time the ignition is cycled on/off and come back when the car is driven? 17965 with a new AMM will mean a faulty N75 valve, a vacuum leak on the circuit or a failed turbo actuator/jammed vanes.

[tomt 59]

hi crasher power loss is not permanent but does not always clear when it turned off and back on .some times power loss can happen and power return without the ignition cycled off/on happening .but in the past when power loss has happened as soon as ignition is switched off and back on the power returned. power loss is happening much more lately cheers crasher look forward to your reply