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Hi all, looking for opinion/advise. Had issue the other day with multiole errors/warning lights with EPC, ACC error, park assist etc, which looked like low battery issues. Battery checked and was low and wasn't taking charge properly or fully charging so replaced with new AGM one. All looked good, start up no errors so drove off, let temps come up then gave bit off boost (nothing like WOT). Immediately EPC on and strangely ACC not working again and car in limp mode... Codes checked and attached flagged up. Turbo problem?? Seems coincidental all other warnings seemingly related to the battery and this happen at exactly same time? Recommendations for specialist fault diagnosis and repair near Wrexham? TIA

20210519_165523.jpg

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Check the turbo actuator; could be sticking or the voltage may be out of tolerance.  If you look at the live data for the Engine module, the voltage should be listed under 'Charge air pressure control valve uncond voltage sensor' (though I'm not sure if your diagnostic tool will list it the same as VCDS/obdeleven.   Should be ~3.7V, with the engine idling (for a stock turbo)

 

Boost/torque issues can result in safety/driver assistance systems such as ACC being disabled. I believe it's because they are linked to the fly-by-wire system for the throttle. 

 

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Thanks Penguin. I noticed a slight oily deposit this morning on the air intake housing and was wondering - could intercooler and/or hose issue cause same fault (would have thought it would be more a boost system error) but it is all connected)?🤔 

 

And long shot but still keen to hear recommendations for diagnostic/repair that will be required local to me (Wrexham area)

 

Cheers

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Where exactly was the oil? Where the breather hose connects?  Defo worth checking all hoses/connections in the vicinity of where you spotted that oil.  Even if you just give everything a clean so it's obvious if any new oil is fresh or it was just old engine bay crud.  Could need smoke testing or the soapy water method to check all hoses/connections.   Can you hear any hissing or whistling? 

 

I've had a similar issue recently but it was easier to track down and check everything as I had a turbo replacement.  In my case it was caused by the actuator voltage being way out of tolerance but after I sorted this I had everything checked for boost leaks too, for additional peace of mind. 

 

Good luck getting it sorted. 

 

EDIT: Are you seeing a P133500 error code too?

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Hi Penguin

 

That seemed to be the only code that was showing. Need to get it on full diagnostic and fault find - booked in with local guy who did good job on pre checks on wifes new car few weeks back (and found couple of issues from diagnostics that we got fixed under warranty before they actually became problems)👍

 

Cheers

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Update 25/05/21

 

Fully checked and it's a sticking wastegate thats the issue. All checking, cycling and poking around has freed it off and car is running fine with no stored codes. BUT, almost certain to come back so turbo being removed next week and see whether its easy sort or whether turbo replacement is better option. At least I know there is no impending doom, other than to my bank balance!

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  • 2 weeks later...

Update 07/06/21.

 

Stripped down and various bits removed to open turbo up. Offending part seems to be as per image attached - can anybody confirm what this part on the turbo is and whether it is actually serviceable/replaceable or whether its new turbo time? Rest of turbo is actually spot on and zero play in shaft, virtually no carbon deposits... 

20210607_134209.jpg

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I’m assuming your referring to the wastegate? 
 

I would use the opportunity to mitigate any future issues (whilst fixing this one) and get a non-IHI replacement turbo. Speak to Dan at Littco or look at the TTE option. A direct replacement for the stock IS38 would be a good choice as it won’t need any custom tuning. 

 

Factor in labour costs of £300-400. (Ball park figures) 
 

e,g; 

https://www.littco.co.uk/l380-turbo-74-p.asp

 

Cheaper option would be to find a really reputable turbo specialist and ask the for advice on whether or not it can be fixed.  I'm sure this is an integrated part so your options on a repair may be limited/non-existent.  

 

 

 

 

 

 

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Just now, Msportman said:

New / recon turbo time.

Awesome now sell direct replacement from TT….uprated cartridges/ bearings 

Works with OE ( Stage 1 or 2 on existing software 

Cheaper than sending it for repair to existing companies 

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13 hours ago, Msportman said:

New / recon turbo time.

Awesome now sell direct replacement from TT….uprated cartridges/ bearings 

Works with OE ( Stage 1 or 2 on existing software 

 

Aren't they quite expensive though, like £1000+?

 

Littco do the L380 which comes in under a grand and you can get just the core for around £400, that's what I'm opting for.

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4 hours ago, ChazR said:

 

Aren't they quite expensive though, like £1000+?

 

Littco do the L380 which comes in under a grand and you can get just the core for around £400, that's what I'm opting for.

I don’t think the core only would be a viable option for the OP as it wouldn’t include a new wastegate (?) 

 

The TTE option is more attractive with their replacement program but as the OP doesn’t have a working IS38 to send in exchange,then it does become expensive. 

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6 hours ago, Penguin said:

I don’t think the core only would be a viable option for the OP as it wouldn’t include a new wastegate (?) 

 

The TTE option is more attractive with their replacement program but as the OP doesn’t have a working IS38 to send in exchange,then it does become expensive. 

I agree if the old turbo is goosed it’s pretty expensive. With labour vat etc you’ll be nudging close to £1800-£2k.

If it were me I’d consider TTV4 to upgrade my stage 2 but no further.

 

You could look for a cheaper used IS38 on EBay.

 

Have you tried Turbo Dynamics in Bournemouth? They repair and build some great turbos across many manufacturers?

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7 hours ago, Msportman said:

I agree if the old turbo is goosed it’s pretty expensive. With labour vat etc you’ll be nudging close to £1800-£2k.

If it were me I’d consider TTV4 to upgrade my stage 2 but no further.

 

You could look for a cheaper used IS38 on EBay.

 

Have you tried Turbo Dynamics in Bournemouth? They repair and build some great turbos across many manufacturers?

 

Yeah i think id try get a cheap IS38 off eBay and then get a new core, would be able to do that for less than a grand i think!

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1 hour ago, ChazR said:

 

Yeah i think id try get a cheap IS38 off eBay and then get a new core, would be able to do that for less than a grand i think!

Sounds a plan.

Unfortunately with all modern cars nothing is a cheap fix anymore.

One reason I still love my plain old simple MK2 16v GTI but it’s becoming more difficult to source certain parts.

 

You can understand people just forking out monthly for new cars and chopping them in every 3 years if not into modding etc. Still expensive per month on a £40k car so you need a good salary!

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