Thread: Secondary Turbo Charger problems My12 SDV6 HSE Disco 4

Has the secondary turbo's inlet isolation valve been checked?

Check out
3.0l Turbo malfunction

Ive got the similar error codes on my 2010SDV6SE, but my secondary turbo is less than 2 years old, so i struggle to believe its the actual turbo.

Mines throwing those two codes intermittently for the past two weeks, and when not, the turbo runs fine, no white smoke or loud noises (usual death-symptons for turboes)

Check the solenoid as Graeme suggests, and the secondary air control valve (front drivers side low behind the intercooler) for sticking bits. Finally the actuator at the turbo may need some tlc, but its a bugger to get to.

The new oil drain pipe, whilst a good preemptive measure, will not solve the P22 code.

Originally Posted by Eric SDV6SE

Finally the actuator at the turbo may need some tlc, but its a bugger to get to.

What's the actuator that you're referring to? The turbo is fixed (neither VVT nor VNT) and without a waste-gate.

Originally Posted by Graeme

What's the actuator that you're referring to? The turbo is fixed (neither VVT nor VNT) and without a waste-gate.

Secondary turbo on the 3.0 is a VVT, the linkage that is solenoid controlled varies the vane angle on the exhaust side to control boost pressure.

See photo. The actuator can get stuck either at the black box end or at the pivot point. The black box is the secondary actuator controller. Theres a servi motor in there that drives the actuator to vary the vanes on the exhaust side, this varies airflow and hence pressure on the clean air turbine side20190813_210152.jpg

What year model was that fitted to and you're sure that's the secondary rather than the primary? They were certainly fixed initially.

Originally Posted by Graeme

What year model was that fitted to and you're sure that's the secondary rather than the primary? They were certainly fixed initially.

Oops, got my wires crossed (again), its the primary thats VVT, not the secondary, i stand corrected.

Thanks Graeme, apologies for any confusion.

Thanks for advice. The big issue I have is on start up there is some white smoke. Once the actuator valve shuts it stops then re appears at about 2800rpm which makes me think that the turbo is on the way out. whilst tat the moment there is no noticeable change in the noise of the Turbo I feel its only a matter of time.

Has full throttle been held long enough for the smoke to stop being produced each time? Quite a lot of oil can build-up in the inlet isolation valve and in the bottom of the intercooler but if the smoke doesn't stop after 30 seconds or so of full throttle then there may be a problem.