Lost power no boost

[Gingesuper7]

hey there this is my first post but i need some help, i have an 04 plate Leon cupra 150 TDI and while on a trip back home to scotland from basingstoke the power just went, i have had a good look round at all the pipes etc etc and could not see any probs.
My mate has a Code reader though not a VAG com one, the error code it throws up is 0236, which is turbocharger boost sensor A circuit range performance, I am off to Afgan in a few days and would really like to try and sort the car before i go,

does anyone know what this error refers to? if not is there any good
independents in the Basingstoke/Fleet/Guilford kinda area save me using a stealership?

many thanks and sorry if this has been answered over and over again i couldnt find anything searching

 

[glynnd]

There are lots of things that have input into the boost control It could be any of the following
Boost control valve
Maf
Map sensor
I have spares of the map sensor and the boost control valve

 

[cheshire cat]

if it's not cleared switching off and on you will need to clear with vag com or stealer, and wait for the next time, have a safe trip, you lads ARE appreciated

 

[Gingesuper7]

hey there Ginge has done one to Afgan i have been left with his motor to sort, i took it and got the codes read on a vag com,
i dont think the guy is all that though as he told me straight up that it was the ecu and it would be £500 plus labour to change,
i personally rekon it is more the boost control valve or the map sensor, as i have had the same prob in my ex- missues gt tdi golf which was the 130, and after a bit of farting around sorted it,

Glynnd where about are you with them spare parts?

many thanks Jock

 

[Viking]

Is it intermittent or has the power gone completely? Is it okay when you first start up, and then drops off suddenly (like when going up a hill, maybe) and then stopping the engine and restarting sets you away again?

 

[Gingesuper7]

the fault was cleared and it ran fine then all of a sudden the ecu light was on and there was no power, ie limp home mode, it wont clear by turning off the key? does un coupleing the battery on these reset the ecu?

 

[glynnd]

Must be disconnected for at least 30 minutes to do an ecu reset
Glynn

 

[Gingesuper7]

cheers where abouts are you mate? i wouldnt mind trying a diff map and boost control valve to see if it clears the snag

 

[sssstew]

you say you got it scanned with vag com, what were the errors logged as in there?

 

[Gingesuper7]

it was me mate that had it read i will have to see if he had a print out or somthing

 

[daveyonthemove]

The fact that the ECU allowed a scan makes me think that you won't need to shell out for a new one.
It's more likely a split hose or loose connection. I take it you lads are RAF @ Odiham if your in Basingstoke area?
If so, try the lads at MTMS as they were helpfull when i used to be there. Shame i'm nto still donw there as i would have done a Vagcom reading for you.
Dave

 

[Gingesuper7]

yeah mate thats the one, You know what i never thought of asking any of teh lads up at mtms if they had a vag com, there is a lad here thats DUB mad does the Mk4 golf use the same system ( vag com i mean?)

 

[daveyonthemove]

Even if they don't have Vagcom, ask them to get it up on the ramp and tell them that a fault code points in the direction boost sensor. They might spot something and ask for some jaffa cakes or a slab of beer (good old RAF Currency )so worth a try. If the car is still under warranty then get it back to the dealers. Don't go looking for ECU's just yet.

MK4 Golfs do have the same chassis, engines and electrics under the bonnet. Vagcom is capable of scaning nearly every VAG car so don't worry about make and model too much.

 

[Gingesuper7]

sweet, never played with VAG much i have always been in to the jap stuff, but a lexus and these are a different fish lol

 

[aceman]

I would also get the VNT mechanism checked on the turbo as they are prone to sticking which can cause the turbo to overboost tripping the ECU into limp mode. The mechanism can be checked and exercised using vagcom which may free it up but most likely only temporary, to do it properly you need the turbo off and dismantling. Some garages will try and sell you a new recon turbo but cleaning it should do the trick.

That's just one possibility as there are others related to this such as vacuum valves and hoses that control the VNT mechanism so they should all be checked also.

Hope you get it sorted for your mate while he is serving queen and country.

 

[TornadoRed]

i have an 04 plate Leon cupra 150 TDI and while on a trip back home to scotland from basingstoke the power just went, i have had a good look round at all the pipes etc etc and could not see any probs.
My mate has a Code reader though not a VAG com one, the error code it throws up is 0236, which is turbocharger boost sensor A circuit range performance...

the fault was cleared and it ran fine then all of a sudden the ecu light was on and there was no power, ie limp home mode, it wont clear by turning off the key?

The fact that the ECU allowed a scan makes me think that you won't need to shell out for a new one.
It's more likely a split hose or loose connection.

Good information here, ruling out a faulty ECU.

Usually, a turbo boost problem, overboost or underboost, resulting in limp mode, can be temporarily remedied by a quick restart. Since this is not the case, I wonder if there aren't two problems -- a turbo boost problem that comes and goes, and another problem that may have nothing to do with the turbo, but which is causing reduced power -- probably through an incorrect airflow measure, leading the ECU to reduce fuel.

If it's not the mass airflow sensor (MAF), then a split in one of the vacuum hoses could cause this problem. This would not necessarily trigger a CEL/MIL. Check out hoses leading from the vacuum booster.

 

[Dave H]

I have had my first limp mode today. Cold engine accelerating off a roundabout through the gears 2,3,4 and at 65mph shift from 3rd to 4th, the car lost the turbo boost and nearly all power, I proceeded at 70mph in 5th gear with no response to acceleration.

pulled off the dualc/w within 1 mile of the roundabout i pulled away from. Switched off, turned on and car back to normal operation... which is a relief for now.

Although working at motorway speeds now, i want to check this out... i'm looking for tips to get my local garage to look at first. Radiator due replacement soon, so will mention this loss of power at same time.