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Home > General > Sudden loss of power but no codes or EML (L320 TDV8)

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RobIpswichUK

Member Since: 28 Feb 2018
Location: Ipswich
Posts: 8

Sudden loss of power but no codes or EML (L320 TDV8)

Looking for next steps on troubleshooting a problem. Was accelerating hard today and suddenly no power. Car still seems to run fine, no noticeable smoke, and no codes. Symptoms are lack of power. Have removed and checked both top boost hoses on the intercooler and looked fine.

Where would you look next?

Mon Sep 25 2023 8:37pm

Pufftmw

Member Since: 23 May 2012
Location: Carmarthenshire
Posts: 1048

2007 Range Rover Sport TDV6 HSE Stornoway Grey

Based on recent experience, turbo actuator

Mon Sep 25 2023 8:48pm

TheWojtek

Member Since: 08 May 2015
Location: Poznań, Poland
Posts: 737

2010 Range Rover Sport TDV8 HSE Buckingham Blue

Based on my experience and collective wisdom od the forums, I believe a sticking turbo actuator would throw a P132 and "Restricted Performance" message on the drivers' display. However a hairline split on the manifold, intercooler or hoses would fit the original description. Regards etc.,

Wojtek

---
WAS: 2006 RRS Supercharged
IS: 2010 RRS TDV8 HSE

Mon Sep 25 2023 9:13pm

Pufftmw

Member Since: 23 May 2012
Location: Carmarthenshire
Posts: 1048

Interesting Woj

My TDV6 is sometimes sluggish at footdown but doesn't always throw that message. It does sometimes

Mon Sep 25 2023 9:29pm

camel_landy

Member Since: 05 Sep 2010
Location: Swansea
Posts: 68

Re: Sudden loss of power but no codes or EML (L320 TDV8)

RobIpswichUK wrote:
Looking for next steps on troubleshooting a problem. Was accelerating hard today and suddenly no power. Car still seems to run fine, no noticeable smoke, and no codes. Symptoms are lack of power. Have removed and checked both top boost hoses on the intercooler and looked fine.

Where would you look next?

Sorry to say those were the symptoms when my turbos went.

There was a little 'pop', followed by no power but no warning lights.

M

Mon Sep 25 2023 10:05pm

TheWojtek

Member Since: 08 May 2015
Location: Poznań, Poland
Posts: 737

Pufftmw wrote:
My TDV6 is sometimes sluggish at footdown but doesn't always throw that message. It does sometimes

I have a recurring "Restricted performance" issue sometimes and it is the left (pass side in the UK) turbo actuator sticking - the relevant code is always stored if this happens and I am always greeted with the red triangle, usually in the middle of passing a truck.
I think it happens when I suddenly demand too much from the car, like queuing behind the said truck at 40 mph for 5 minutes in 5th or 6th and then downshifting and flooring it. That said it happened to me also at 80 mph when I pushed for a high-speed run in Germany.
Funny thing, the car sounds insane when this occurs, like if all the mufflers have been removed (I assume the turbo vanes are stuck wide open). It is always resolved with a power cycle when the actuator is reset.
By the words of my indy, spraying it with grease or WD40 from the outside will not cure it, as it is the soot deposited in the inside of the hot side of the turbo that makes the vanes stick. Tried a 'turbo cleaner' fuel additive with (supposedly) cerium oxide but can't say if it was placebo or did it really help. What does help though is IMHO some more spirited driving, Italian tuneup style. If someone devised a method to clean the hot side of the turbo without removing it (and lifting the body off) with the chemicals LRTime used to clean his turbo in the bucket, I'd be the first to try. Regards etc.,

Wojtek

---
WAS: 2006 RRS Supercharged
IS: 2010 RRS TDV8 HSE

Tue Sep 26 2023 8:32am

RobIpswichUK

Member Since: 28 Feb 2018
Location: Ipswich
Posts: 8

Right so today was having a look, still no EML, but now have 6 current codes:

U0405 Invalid data received from speed control module
P0089 Fuel pressure regulator performance
P065E Intake manifold tuning valve bank 1
P023D Manifold absolute pressure - turbocharger/supercharger boost sensor A correlation
P010F Mass or volume air flow senor A/B correlation
P010C Mass or volume air flow B - circuit low

Any thoughts whilst I start looking them all up?

Tue Sep 26 2023 10:10am

TheWojtek

Member Since: 08 May 2015
Location: Poznań, Poland
Posts: 737

P023D says your turbo output didn't meet the engine demand, however the P010's indicate a discrepancy in sensor readings, as if some air has been "lost" in calculations. I think the turbos not giving equal output (P010F) happens because of P023D (sticky actuator?) but don't know if P010C calls for a new sensor? Regards etc.,

Wojtek

---
WAS: 2006 RRS Supercharged
IS: 2010 RRS TDV8 HSE

Tue Sep 26 2023 10:25am

RobIpswichUK

Member Since: 28 Feb 2018
Location: Ipswich
Posts: 8

So, an update!
Had the hoses off (no leaks or splits), checked the actuators (all moving freely), runs really nicely with hoses off, but airflow from top of intercooler when running (with hoses off) - no airflow from passenger side but loads from drivers side. Not sure but guessing that points to passenger side turbo not spinning, so turbo failure?

Fri Sep 29 2023 3:53pm

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