car juddering when turbo kicks in

[cuprasportturbo]

hi i have a leon curpra 1.8 20v tubro and the other day when i was driving along the car started juddering when the turbo started to boost and sounds like the exhaust is blowing or a tractor lol thought it was the maf but realised the maf was unpluged so i pluged it back in and the car cuts out so i got a new maf and it did exactaly the same i pluged it into a snap on diagnostics and got theses codes

16486
16496
16514
17947
17956
18010
18048

then i cleared all the codes left the car running for 5 mins and gave it a few revs and plugged it back in and got this code

16514

does any 1 have any ideas what it could be and were to start ?

 

[steve carter]

Quick search on google says lambda sensor possibly pre cat. I had mine done costs about £150 at a garage, fitted. Could try clearing fault running on V power and seeing if it comes back,(reccommended when mine failed before changing) sometimes works as it burns hotter than normal fuel and clears the crap off the sensor.

 

[seatcupramad23]

16486- maf signal too low (faulty maf or wiring )

16496/P0112 - Intake Air Temperature (IAT) Sensor 1 Circuit (G42): Low Input

16514- o2 sensor (lamda) (faulty sensor, car will be running lean)

DTC 17947 - Clutch Pedal Switch (F36): Implausible Signal ( i also got this clutch pedal switch nackered)

 

[seatcupramad23]

17956- 17956/P1548/005448 - Boost Pressure Controle Valve (N75): Open Circuit
check n75 is plugged in properly and also could be faulty

18010- Power Supply B+ Terminal 30: Voltage too Low , (often found when battery dies or as been remomved) could also throw up other faults that were previously there

 

[cuprasportturbo]

thanks ill try changing the lambda sensor first see what happens