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[Migv6 le Frog Fan]

BIL has recently bought a 2018 combo van fitted with the above engine which is giving problems.
Performance is a bit sluggish and light on the dash (EML presumably) comes on and off randomly.
He brought it over to me yesterday and I plugged my Autel reader into it, and it gave three codes.

P0235. turbo boost sensor A circuit.
P0069. Manifold absolute pressure barometric pressure correlation.
P0235. ( pending) turbo boost sensor A circuit high.

Other than sticking a £15 ebay boost sensor on it and hoping for the best, Im a bit clueless as to where to start with this.
Anyone got any better thoughts ?

Tia.

[STEMO]

If it has been used for short journeys and not given regular oil changes, it's going to be bunged up.

[Migv6 le Frog Fan]

He does a fair amount of motorway type driving in it.
Dont know about servicing as he has only had it a few months.
I would like to get some clues for him as he uses his local friendly garage and I have the distinct impression that they rip him off as he knows nothing about engines.
Plus, he is alone in my family of in laws as being the only one I would piss on if he was on fire, as somehow he has turned out to be a half decent bloke. 

[STEMO]

You said 'recently bought', so I assumed he'd have no idea how it had been used in the past.

[STEMO]

Timing Chain: The most critical issue; wear leads to rattles, then chain/guide failure, potentially causing catastrophic engine damage (valves hitting pistons).
ECU Water Ingress (Corsa D): Poor ECU placement causes water damage, leading to injector errors (P020x codes), misfires, or complete non-starts.
Diesel Particulate Filter (DPF) & EGR: Clogging from short journeys and carbon buildup causes loss of power, sluggishness, and regeneration issues.
MAF Sensor: Can fail, causing limp mode and reduced power without triggering specific fault codes.
Fuel System: High-pressure fuel pump failures and issues with injector wiring (P2146) or clogged fuel filters occur.
Cold Starting: Can be affected by faulty coolant temperature sensors or glow plugs.


This could be his loss of power.

[Migv6 le Frog Fan]

I told him to give it a good thrash in a lower gear for a few miles on the motorway, which he did but that hasnt solved the problem.
I think he has owned it about 6 months now.

[henryd]

That engine does suffer boost issues sometimes due to the actuator seizing,not easy to get but a liberal soaking with penetrative oil and a lever on the actuator rod often gets them going again

[Migv6 le Frog Fan]

Thanks Henry, if he wants to bring it over to me again I will give that a try. 

[TheBoy]

That engine does suffer boost issues sometimes due to the actuator seizing,not easy to get but a liberal soaking with penetrative oil and a lever on the actuator rod often gets them going again

And often the cause of boost issues for many turbo cars, especially those that haven't been serviced very well over its lifetime.

My poor old battlebus used to get a sticky wastegate, which was a big problem, because it had sod all power to start with .  Every time I did the oil, I always used to give the wastegate lever a good wiggle for a couple of minutes.  I do the same with the EGR levers on the big pussycat, as they can do likewise.  On the Jag, the changeover valve that changes between single and twin turbo usage sticks occasionally, though thats a bit of a bugger to get at - can;t reach from top easily, and from underneath means undertray removal.