turbocharger, wastegate bypass regulator, mass air sensor on 2004 TDI Beetle have all been replaced but the vehicle continues to go into limp mode on steep inclines in an unpredictable fashion. Shutting the engine down and restarting while it is happening seems to reset and it is okay for awhile.
Engine: TDI - diesel
Hello there! I'm Eurocar ! I will try to assist you as much as I can. Quality research = Quality answer!!
is there any fault stored in the ecm?
if so please post the code # XXXXX wording please that is stored!
I don't know the code numbers but the TDI specialist that last looked at the vehicle said there was a code for the turbocharger but everything on the turbocharger appeared to be operating properly. He was not able to duplicate the problem when he drove it. The issue is intermittent and that is usually the case. One mechanic drove it 200 miles and the problem occurred once.
There can be numerous issues and causes. A code # XXXXX narrow the cause. If you can can you get the pxxxx code or the 5 digit fault code to narrow possibilitiesThanks
The code was P0299
turbo charger over boost fault. the turbo charger was already replaced but was it reman, used, new?
were the vacuum hoses replaced to the turbocharger?
let me know?
As far as I know, the turbocharger were new. The part number was 038-253-019-SX. The work was done at a VW dealership. A vacuum hose was replaced 11/2 month later (1500 mi) when the problem occurred again.
ok and the regulating valve do you have that part #?
double checking with parts catalog if correct parts was installed!!
I don't have the part number for the waste gate bypass regulator valve.
i have some instances that egr sticking at the wrong moments causing the over boost issue and then the reduced power mode
please check the egr valve (electronic)
remove and see if the pintle sticks partially open and remove all carbon buildup
Senior VW Master Tech 15 yrs