Afternoon all ..

 

My 57 the 1.9tdi (133,000 miles) developed a sudden loss of power this morning in the midst  of an overtaking procedure.

 

No MIL, no smoke, no oil leaks - just loss of power.

 

A quick scan with Carista shows a P0234 error, which is turbo related. Any thoughts ? Sticky Vanes seems to appear a lot in a search, or is the turbo knackered 😡 

 

I've owned the car for 4 1/2 years, always used Shell diesel, and have been doing kind of regular runs to London from Cornwall over the last year for Daughters University without any issues.

 

Also Googling, and it would seem that £1000 is kind of a ball park figure for Turbo replacement ? 

 

Cheers

 

Mark

over boost would typically be sticky vanes so worth a good clean (Mr muscle) especially at your mileage also so decent fuel/turbo cleaner might help (millers/wynns).  this may resolve your issue for X mileage but will obviously not fix long term.

 

£1000 would probably be the higher end of the figure this would be for a full replacement ..you can remove the turbo recondition it by replacing worn parts, this is typically cheaper.

 

would be interesting to see what other codes you've got flagged up

Search my post on the matter for a probable quick and cheap fix.

2 hours ago, MicMac said:

Search my post on the matter for a probable quick and cheap fix.

 

Is it the Injector Cleaner method ?

No, turbo actuator.

Quick update, cleared the fault code, only for it to re-apoear some 1/4 mile later 😡 

 

Remaining somewhat convinced it's the turbo vanes sticking, I treated the 1/4 tank of fuel to a bottle of Wynns Diesel Turbo Cleaner, then took the car for a 20+ mile drive, at (aggressive) 70mph+ speeds on the local dual carriageway.

 

So far, the fault code hasn't returned, and all is well 🤞 I've got a 600 mile round trip this Saturday planned, but not sure whether to risk taking the car. I'm guessing the trip will do it good ?

yeah long motorway journeys help

Update on my this ...

Yesterday I took my daughter back to Uni, a 580 mile round trip from SW Cornwall to Putney in London.

Treated the Octavia to a tank of V Power Diesel, and away I went.  Air Con all the way, and although the journey was pretty much start / stop due to the unbelievable amount of traffic on the A303 / M3 (taking 7 1/2 hrs) - the journey back via the same route was far less eventful and only took just over 4 1/2 hrs.  Cruise Control set to 70mph most of the way, with the regular blast to overtake something where needed.

MPG had increased on 59mpg (trip computer data) whereas on previous runs like this I was only getting 54mpg.  Normally use V Power on those runs as well.  So I'm guessing that the Wynns Diesel Turbo Cleaner had the desired effect, as I've received no further fault codes or issues at all

Fingers crossed it was just sticky vanes, which I'm guessing is related to the shortish drive in the morning and evening to and from work (just short of 5 miles each way) ... as I also noticed that there was a slight bit of emulsification around the oil filler cap too yesterday.  Nothing sinister there as had it before last year, around the same time.  Short journeys / oil not getting up to a decent temperature - guess I'm going to have to use the Octavia a bit more at the weekends on a decent run ..

Do you always use V Power diesel then ..... I' not convinced putting occasional tanks in really sees the benefit.  I started using it a few years ago in a petrol car, maybe noticed a minor difference but not so much as to warrant the extra cost so went back to standard Shell petrol in the end.  On the diesel however i never personally noticed any difference - having brought my Oct 3 and ran normal Shell diesel for 6 or 7 tanks and then going V Power diesel for around 10 tanks is succession i dont recall seeing anything noticeable at the trip computer ... Added to that the mpg diving when doing regens I think that added to me giving it up as it felt like throwing money away  

 

I always used to use shell but I dont like the new points scheme so now just use Asda diesel.

 

Good that the fault code hasnt come back and maybe some more decent runs will keep it at bay

I try and always use Shell fuel, and occasionally, when I’ve a voucher from Shell, then I will treat the car to V Power. 
 

Much like you, I’ve never seen / felt any difference using V Power, but tend to use Shell as I like to think it’s better fuel 🤷‍♂️ , plus my two Diesel Skodas have never failed an emissions test yet (1.9 tdi, non DPF). 

 

However, I’m well impressed with the Wynns Diesel Turbo Cleaner - car felt smoother, and appeared to return a better mpg. 
 

I also an app called MPG Calc on my phone, and enter mileage & fuel data every time I fill up, keeps an eye on it lol

could someone have advice driving along at 70mph car loses power turbo working fine when i turn the car on and off turbo kicks in ive put a tester on it shows P0234 on the tester 

 

thanks stecve

Mr Muscle enema required.

On 09/09/2020 at 14:57, MicMac said:

Search my post on the matter for a probable quick and cheap fix.

Hi, any chance you could post a link? I've searched 'turbo actuator' and a bunch of other things and looked though your posts but to no avail?

 

Cheers

Doug

@DougQuaid

What problem do you have?

3 hours ago, MicMac said:

@DougQuaid

What problem do you have?

I'm getting p0234 code and I suspect its 'sticky vanes'

 

Thanks for the quick reply BTW 

@DougQuaid

Long story short, if the VNT actuator moves easily and smoothly full travel from stop to stop by hand and returns to the low-boost stop in a positive manner the mechanism is fine.

 

You can test the actuator with the engine idling by removing the vacuum hose and offering it back to the nipple, you will see the actuator move and will hear a slight change in engine note as it goes from low boost to high boost.

 

Here's the long-winded version! 

 

Awesome, much obliged.

Apologies for further hijacking of this thread.

 

@DougQuaid

I believe the root cause of my P0234 was the vacuum spigot on the tandem pump and rigid plastic pipe to the brake servo.

 

The spigot is a crimp fit and becomes loose with vibration allowing a vacuum leak as does the rigid plastic pipe if split, check if your brakes feel wooden and ineffective.

 

Atmospheric moisture ingress into the vacuum system corroded the VNT actuator diaphragm spring with tell tale signs of rust in the vacuum solenoid block, eventually the spring broke and so the VNT actuator was unable to fully set low boost hence the overboost condition.