Technical variable geometry turbocharger position sensor deviation signal amplitude > maximum

[Fiatjohn500]

So ! Argh
variable geometry turbocharger position sensor deviation signal amplitude > maximum
I’ve got the 1.3 multi jet

Got this 1 fault code P2563-22 being unwise to this bought another turbocharger waste gate acctuator that has the position sensor in it thinking it was goosed
Anyway fit it still getting same code can not get it to reset or delete the code
Could a possible failing vacuum pump cause this. Or have anything to do with it If I disconnect the hose of the actuator and connect the pressure gauge I’m only getting -8/9 if I rev the car it goes up to -21 ish and then holds there
Am I correct that the hose from the vacuum pump goes to the accumulator then to the Selonoid then to the wastegate actuator or is there something teed in after the reservoir
I can not seem to find any diagrams to see any different.or YouTube vids and the ones I can find show a difffernt wastegate acctuator ( the one with out the electrical connection on ) The little flip lever on the turbo is not stuck and freely moves the vain’s are not stuck the car drives fine just mot due and eml light is laughing at me
I’m not understanding the
((variable geometry turbocharger position sensor deviation signal amplitude > maximum))
And nothing I can find seems to explain it to fix it. Thanks
And I carnt seem to find same problem on here either

 

[bugsymike]

May be unrelated, but daughter had an issue with a VW Golf 130hp GTD going into limp mode and it was caused by the actuator not going fully in each direction up to it's stops. Fine after I freed it off with turbo cleaner foam etc.
Then turbo additive in fuel, plus a good blast once a month as most of her journeys were across town at slow speed, worst thing for modern diesels.

 

[The Panda Nut]

Mirrors my experience with the VAG 2.0D. I was advised to use diesel fuel cleaner additive regularly. It seems 99.8% is not good enoughfor tgese sensors. I sold that car as it had many other issues of a similar nature. Here I am nearly 20 years on, a happy Fiat driver.
CLEAN THE VEIN PIVOTS until you caan clean no more, or send it to a turno specialist rebuilder

 

[ZaphodB]

.... plus a good blast once a month as most of her journeys were across town at slow speed, worst thing for modern diesels.

The ubiquitous (and painfully ironic for a Fiat ) italian service

 

[bugsymike]

The ubiquitous (and painfully ironic for a Fiat ) italian service

A bit like when I raced Karts in the late 60s and asked what revs did you change up and was told when the valves bounce, this on a two stroke.