All Things Mk5 > How to Guides / Troubleshooting

p0299

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cutchie:
So I've had the underboost fault for a wile now replaced the dv pcv and the waste gate actuator, this week I fitted a boost gauge and got the car smoke tested. I'm getting 4 psi and dropping to 3/3.5 and no boost leaks were found anyone any ideas where to go from here?

cutchie:
Sorry waste gate solenoid**

Ricky123:
Any mods?
Have you had a scan done with vagcom?

I'd double check all pipes, check intercooler for cracks too.

Dan648v:
Had this code on my gfs a3 tdi and it was the actual actuator at fault. Replaced the unit and boom. Boosting again! Think the diaphragm had split inside?

Dan_FR:
So you've replaced the N75 rather than the actuator? Does sound like the actuator is at fault, not unheard of as mentioned above

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