D Beddows
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| posted on 20/8/13 at 09:53 AM |
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VAG TDI Error codes 00665 & P0299
My company Passat is suffering from an attack of them  Can anyone recommend someone in the NW who actually REALLY knows what they're doing
with VAG TDI's?, we've had it to 3 garages now and each of them has a different opinion as to what's broken but non of them seem to
be able to fix it 
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JAMSTER
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| posted on 20/8/13 at 10:43 AM |
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16683/P0299/000665 - Boost Pressure Regulation: Control Range Not Reached
Possible Symptoms
Reduced Power Output
Limp Mode
Possible Causes
Hoses/Pipes incorrect connected, disconnected or leaking
Charger Pressure Control defective
Turbocharger faulty
Diverter Valve faulty
Possible Solutions
Check Hoses/Pipes to/between Components
Check / Clean / Replace Charge Pressure Control
Check Turbocharger
Check Diverter Valve
Special Notes
When found in 2.0l TFSI:
Check Boost Pressure Control Valve (N249), for cracked rubber diaphragm. A new/optimized Valve is available under Part # 06H-145-710-D (or newer).
RoW vehicles see: TPI 2016331 for details.
NAR vehicles see: TSB 01-07-70 or 2013392 for details.
When stored in conjunction with misfire codes and/or fuel trim faults see the notes associated with the following faults regarding PCV failure:
Crankcase Breather Valve
If the Turbocharger is faulty due to mechanical / internal problems or the exhaust system is restricted (typically the Catalyst) this fault may be the
end result.
When found in VW Golf/Jetta (1K): 2.0l CR-TDI (CBEA/CJAA):
Verify the mechanical part of the Exhaust Valve Control Module (J883) is not siezed or binding.
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mcerd1
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| posted on 20/8/13 at 10:51 AM |
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sounds familiar
google says both those codes are related to the boost pressure (specifically under boost)
"00665 Boost pressure regulation control range not reached"
"P0299: Turbo/Super charger underboost"
trouble is that could be caused be several things....
it could be that the variable vanes on your turbo have seized up, or it could just be a leak in the hoses or even just a dead sensor.... and so on
a mate of mine went through this with an astra - several garages and even the main dealer swapped various bits (costing him £hundreds) eventually it
turned out to be just a sticky vacuum pump on the alternator causing a an intermittent lack of vacuum to operate the turbo's vanes (£50 to
strip, clean and rebuild the pump)
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JAMSTER
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| posted on 20/8/13 at 11:17 AM |
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also had a skoda 2.5 vag engine with low boost and that turned out to be a blocked exhaust after skoda saying it needed a new turbo?? all we did to
find this was to disconnect the exhaust from the turbo and run it up the road it costs nothing to drop you exhaust off
[Edited on 20/8/13 by JAMSTER]
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D Beddows
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| posted on 20/8/13 at 11:23 AM |
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quote:
Originally posted by mcerd1
sounds familiar
google says both those codes are related to the boost pressure (specifically under boost)
"00665 Boost pressure regulation control range not reached"
"P0299: Turbo/Super charger underboost"
trouble is that could be caused be several things....
it could be that the variable vanes on your turbo have seized up, or it could just be a leak in the hoses or even just a dead sensor.... and so on
a mate of mine went through this with an astra - several garages and even the main dealer swapped various bits (costing him £hundreds) eventually it
turned out to be just a sticky vacuum pump on the alternator causing a an intermittent lack of vacuum to operate the turbo's vanes (£50 to
strip, clean and rebuild the pump)
Yeah the "and so on " bit is the problem - there is a list of things it 'could' be and it's not my car so I'll
be damned if it's going to be me that gets his hands dirty checking what it isn't - I just want to find someone who actually knows how to
fix VAG TDI's and leave it with them until it's fixed
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PSpirine
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| posted on 20/8/13 at 11:41 AM |
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If you were closer I would do a proper VAG-COM scan on it, that tends to narrow it down a lot more as you can monitor actual sensor parameters and
exclude things like sensors.
However, that combination to me suggests:
1) Boost leak (would be quite a big one)
2) Turbo knackered
3) If it's a variable geometry turbo, it could be the actuator/mech/vacuum for that, but you'd need to check that on vagcom when driving,
as it shouldn't throw up that error unless under high load.
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mcerd1
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| posted on 20/8/13 at 11:54 AM |
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quote:
Originally posted by D Beddows
Yeah the "and so on " bit is the problem - there is a list of things it 'could' be and it's not my car so I'll
be damned if it's going to be me that gets his hands dirty checking what it isn't - I just want to find someone who actually knows how to
fix VAG TDI's and leave it with them until it's fixed
I could get you recommendations up in this part of the world, but I'm guessing thats not going to be much use to you...
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D Beddows
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| posted on 20/8/13 at 12:28 PM |
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quote:
Originally posted by PSpirine
If you were closer I would do a proper VAG-COM scan on it, that tends to narrow it down a lot more as you can monitor actual sensor parameters and
exclude things like sensors.
However, that combination to me suggests:
1) Boost leak (would be quite a big one)
2) Turbo knackered
3) If it's a variable geometry turbo, it could be the actuator/mech/vacuum for that, but you'd need to check that on vagcom when driving,
as it shouldn't throw up that error unless under high load.
No idea!  there's no audible indication of a boost leak, the boost pressure of the turbo has been tested and that's fine, could be the
vanes on the turbo but who knows.
You can tell when it's about to go because about 20 seconds before there is a very slight flat spot, you press the accelerator and it's in
limp home again. It's not consistent though, yesterday I was struggling to get it to do it and mechanic number 3 also struggled - today getting
it to do it is easy.
Sick of it to be honest now I just want it fixed - it's put me off owning VAG diesels forever tbh
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JAMSTER
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| posted on 20/8/13 at 12:34 PM |
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what engine 1.9 2.0 2.5???
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mcerd1
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| posted on 20/8/13 at 12:35 PM |
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quote:
Originally posted by D Beddows
Sick of it to be honest now I just want it fixed - it's put me off owning VAG diesels forever tbh
I've know people who've had similar issues with GM cars (mainly Vauxhalls), fords, VW's, pugs, landrovers...... etc
...in fact almost any modern diesel - they are all far too complex for there own good IMHO so I'm sticking to petrol 
[Edited on 20/8/2013 by mcerd1]
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D Beddows
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| posted on 20/8/13 at 12:37 PM |
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2 litre 130bhp (08 plate)
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D Beddows
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| posted on 20/8/13 at 12:47 PM |
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quote:
Originally posted by mcerd1
quote:
Originally posted by D Beddows
Sick of it to be honest now I just want it fixed - it's put me off owning VAG diesels forever tbh
I've know people who've had similar issues with GM cars (mainly Vauxhalls), fords, VW's, pugs, landrovers...... etc
...in fact almost any modern diesel - they are all far too complex for there own good IMHO so I'm sticking to petrol
[Edited on 20/8/2013 by mcerd1]
Tell me about it - I've got some money coming in shortly, I'm off to buy a petrol engined Honda and they can stick this Passat in the skip
[Edited on 20/8/13 by D Beddows]
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D Beddows
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| posted on 28/8/13 at 07:50 PM |
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quote:
Originally posted by PSpirine
If you were closer I would do a proper VAG-COM scan on it, that tends to narrow it down a lot more as you can monitor actual sensor parameters and
exclude things like sensors.
However, that combination to me suggests:
1) Boost leak (would be quite a big one)
2) Turbo knackered
3) If it's a variable geometry turbo, it could be the actuator/mech/vacuum for that, but you'd need to check that on vagcom when driving,
as it shouldn't throw up that error unless under high load.
Thought I'd better answer my own questions
Hats off to PSpirine it was number 3 above - £250 the final bill..... not my money so.........
As to the question regarding a decent VAG diesel mechanic in the NW - Andy at Prestige Auto Repairs in Warrington (a German car specialist Indy)
diagnosed and fixed in half a day what 3 other recommended garages hadn't been able to even diagnose correctly. So if you're in the area
and having similar problems he might be worth a try.........
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