Limp mode on my 2.0 dti and fault code is p0243.

[dazza2393]

my veccy 2.0 dti has been playing up my mate plugged his magigal tool in and it came up P0243 Boost Pressure Valve Position Sensor.does anyone know what it is and where i can find it on my engine?thanks.

[jamesmcuk]

usually related to the Turbo wastegate valve but could be other things that cause the symptom, but start by checking that the gate is working properly

[dazza2393]

is it on the side of the throttle body?

[bobssignum]

DSCF0002AA.jpgDSCF0003AA.jpgIMG_3211B.jpgDSCF0001AA.jpgthe turbo wastegate is attached to the turbo itself

Also worth checking that the vacuum hoses dont have any splits or signs of perishing , this is a common problem on the Dti,s .
best bet is to change all the rubber vacuum tubing with silicon tube , you need three meters to do a DTi , cost ,s around about £7 on e bay

[dazza2393]

my car has only one bulkhead actuaor.there is a plug next to thre one i have.never had this before.

[bobssignum]

Some of the Dti s only have the one because they dont have the TP sensor on the inlet manifold, see third pic .

[dazza2393]

thanks mate.its still doing it.limp mode.i cleaned the sensor with mr muscle oven cleaner is this damaging the sensor do you think?

[bobssignum]

Get your misses or a mate to rev the engine for you while this is going on see if the wastegate diagfram arm is moving on the turbo.
You may have to rev the car up to 2000 rpm to get the arm to move if it does not move then i would suspect that you have a leak in the vacuum hose system this will cause the car to go into limp mode .

Would not exactly recommend mr muscle for cleaning boost sensor,s, but hey each to there own

[dazza2393]

so why would the diagnostic come back boost pressure sensor?cant really push the turbo as goes str8 into limp mode onlt revs to just under 3k revs!!!

[dazza2393]

so is it the sensor or what?the tool doesnt lie.it says boost pressure sensor,would this say that even if it was dodgy pipes?