Morning all,

Got the old p0234 code on Friday with no power/boost. Ignition off and on sorted it then reset the code and all has been fine. I'm guessing it's sticky vains and Mr Muscle time? With my own stupidity I ignored it last time and ended up with a blown turbo and being recovered.

What I was wondering is are there any cleaners out there that can be used to stop this happening before the vains stick? What else can be done to combat this?

Cheers

Vijay

I posted on the FB page and got some very useful information which may help someone else too:

Beyond cleaners, there are several practices and checks that can significantly combat sticky turbo vanes:

* "Italian Tune-Up" (Regular spirited driving): This is one of the most effective non-chemical methods. Regularly driving your vehicle at higher RPMs (e.g., on a highway, safely and legally) helps to increase exhaust gas temperatures. This elevated temperature can burn off soot and carbon deposits before they have a chance to accumulate and harden on the VGT vanes. Avoid prolonged periods of only short, low-speed trips.

* Quality Fuel: Using good quality diesel fuel from reputable stations can help reduce the amount of contaminants and improve combustion efficiency, leading to less soot.

* Regular Oil Changes with the Correct Oil: Engine oil quality and timely changes are critical. Using the manufacturer-recommended low-ash engine oil (often C3 or C4 specification for modern diesels) helps reduce the ash content that can contribute to deposits. Contaminated or old oil can also contribute to soot.

* Check for Exhaust Leaks: Any leaks in the exhaust system before the turbo can reduce the exhaust gas velocity and temperature reaching the turbo, making it more prone to soot buildup.

* Inspect Boost Control Solenoids/Actuators: While you suspect sticky vanes, sometimes the electronic or vacuum actuator that controls the VGT vanes can be faulty. A malfunctioning actuator won't move the vanes correctly, even if they're not sticky. Have this checked if the problem persists after cleaning.

* EGR Valve Health: A faulty or heavily carbonized Exhaust Gas Recirculation (EGR) valve can lead to incomplete combustion and increased soot production, which then gets routed back into the intake and eventually to the turbo. Keeping your EGR valve clean and functioning properly is important.

* Air Filter Maintenance: A clogged air filter can restrict airflow, leading to incomplete combustion and more soot. Ensure your air filter is replaced according to the manufacturer's schedule.

* Professional Turbo Cleaning/Inspection: If "Mr. Muscle" doesn't fully resolve it, or if you're uncomfortable with the DIY approach, a professional turbo cleaning or even removal and manual cleaning of the turbo housing might be necessary. Some specialists can also assess the turbo's overall health.

Given your past experience with a blown turbo, being proactive is definitely the smart move. Starting with some of the preventative measures and the "Italian Tune-Up" is a good first step. If the P0234 code returns, then it's time to consider the "Mr. Muscle" treatment or professional intervention. Good luck!

Are you sure its not the actuator thats sticking. My 1.9tdi had similar code but the actuator was sticking at a certain point. Loads of spray oil and manual operation for a good while and its been good ever since. I have read that the problem with Mr Muscle etc is it can eat alloy. Personally I would remove turbo and clean it on a bench or replace turbo core.

Aladair

Not sure at all but will deffo have a look at it. I would say it's the way I've had to drive more recently as got caught slightly over the speed limit.

I just don't have time to pull the turbo again so really looking for options on car if possible :(