Engine: B5254: ECM6814 Turbo control signal too high

[100K+]

V70 2004 AWD R
While clearing an ABS fault code on VIDA/DICE caused by a cracked Reluctor ring, the above fault code was discovered. The car is a bit down on power, but hardly noticeable - to my driving style. There was no MIL light.
Vida says possible cause is defective boost pressure sensor, but where the heck is it?
Where Vida says it is, it aint. Its there on my T5, about midpoint on the air intake between the intercooler and the throttle body.
My R does have an "Intake manifiold pressure sensor", which is about an inch from the intercooler outlet hose Does this double as a boost pressure sensor?
There is no sensor there on my T5.

DICE readings (car at standstill) are :-

Boost pressure 970 hpa @ Idle
1000 hpa @ 4000RPM
1050hpa @ 5000RPM
Duty cycle 0% @ all rpm
Desired Boost 988hpa @ all rpm

Any help/comments appreciated.

Cheers

Bob.

[Ringsting]

on my t5 the boost pressure sensor is attached the outlet of the intercooler, bit of a bugger to get to, should be the same on your R. your t5 must be the 2.3ltr version?

[100K+]

Originally Posted by Ringsting

on my t5 the boost pressure sensor is attached the outlet of the intercooler, bit of a bugger to get to, should be the same on your R. your t5 must be the 2.3ltr version?

Yep a mate from Oz put me in the right direction. see attached

Yes my T5 is the 2.3 - it was a doddle to find there which is what confused me, as Vida said that was where it should have been too on my R.

Suspect it will be "a lot of a bugger" to remove, as torx badly corroded. might drill a hole in the slam panel to gain access with extension 1/4" drive.

Cheers

Bob

[100K+]

Finally got to the bottom of this fault. Vida actually says as well as a pressure sensor fault, there could be an air leak down stream from the turbo. I ignored this, as a split O ring had been repaired - with superglue not a week before.
Upon working to remove the charge pipe it just lifted straight up once the two bolts which hold it to the engine were removed. The O ring was 25% missing, what remained was in one piece, but with several nicks which almost cut the ring. My super glue repair was still sound , as I had marked the repair with a marker.
What I had failed to do, was secure the flanges of the charge pipe and the turbo together with the "C" clamp and so the thing worked loose.
How did I know this was the problem?? My eldest daughter asked what was wrong with the car as it was making a wooshing noise when accelerating.
Her young ears heard it - I couldn't. but I knew what it meant. New O ring solved problem and this time I made sure the C clamp was fitted correctly.

Cheers

Bob

[BigTazScotland]

where exactly is the O ring as when we had the charge pipe off i never saw any at all?

also wheres the c clamp do you have any pictures that could help?

[alpinto1]

DTC ECM-6814, can be present, when the car has a default turbo Solenoid valve (3-Way Solenoid Valve).