vw passat limp mode and no codes ???

[tonymac5]

hello ive a 2015 vw passat for the last few months it has been going in and out of limp mode and no eml or fault codes shows up

its seems to go in to limp mode when under pressure like up a hill and then comes back out of itself again, i have bought it to a few diffrent mechanics and all are confused

all the filters have been changed a month ago , crank seal done, timing belt done, new battery, new alternator, octator selenoid and few pipes replaced

dpf cleaner used and turbo cleaner used, its has been on more diagnostics machines and no code faults even vw are unable to tell me whats wrong with it

so any help or advice would be helpful
thanks

[mickeybo]

certainly a vac problem falling off check out with a vac gauge at turbo actuator vac should read 26/27 hg/in

[Crasher]

If it is really limp mode, it has to leave a code.

[tonymac5]

hello ive a 2015 vw passat for the last few months it has been going in and out of limp mode and no eml or fault codes shows up

its seems to go in to limp mode when under pressure like up a hill and then comes back out of itself again, i have bought it to a few diffrent mechanics and all are confused

all the filters have been changed a month ago , crank seal done, timing belt done, new battery, new alternator, octator selenoid and few pipes replaced

dpf cleaner used and turbo cleaner used, its has been on more diagnostics machines and no code faults even vw are unable to tell me whats wrong with it

so any help or advice would be helpful
thanks

thanks for the replys will have it checked again this week with the gauge hopefully get a result as its keeps going in and out of limp mode and no codes to tell me when i put foot on pedal and get no throttle over 3000 rpm or boost

[Crasher]

Which code reading system are you using?

[tonymac5]

WhatI h code reading system are you using?

its has been put on all the best main code reading systems available including volkswagens main system and its been reset back to factory setting and still limp mode and no code

thought it was the dpf a few weeks ago as soot level was 9.3 and now its down to under 3.0. thought it might be the egr value but now i think it is the turbo as i have had to top it up

with more oil every week, if it was the turbo it should still give out a code ???

[Crasher]

I can’t accept real limp mode and no codes, it doesn’t add up.

[tonymac5]

I can’t accept real limp mode and no codes, it doesn’t add up.

if i knew what was wrong with it i would have it fixed but with no codes it becomes a guessing game with costs