BBA-Reman Forums



Volkswagen Transporter T5 - Low on power and PO299 fault code

Posted By jammyjambo Monday, August 03, 2015 5:58:36 AM
Add to Favorites1
Author Message
jammyjambo
 Posted Monday, August 03, 2015 5:58:36 AM
Saturday Job

Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)

Group: Awaiting Activation
Last Active: Friday, July 29, 2016 2:53:12 AM
Posts: 8, Visits: 43
10
Hi there

I'm at a complete loss with my van. (2007 2.5TDi 174BHP)
The coil warning light appears when going up hills around 65-70mph.. Also when trying to exceed 75mph (on French toll roads)
Every time it goes into limp mode and the PO299 fault code is registered. This clears with a stop/start.
The vehicle seems okay until about 55mph but then 5th and 6th are really gutless and it won't go over 80 tops!

It's had a new Turbo, MAP, MAF, N75. The vac pipes and high pressure pipes have all been checked.

I'm at a loss what to do next. Even the garage doesn't know what's causing the power loss and fault code.

Please help as I'm supposed to be driving it to France on Friday for two weeks in the Alps.

Thanks, James
RichTT
 Posted Monday, August 03, 2015 7:28:16 AM
Forum Master Technician

Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)Forum Master Technician - (1,559 reputation)

Group: Forum Members
Last Active: Wednesday, October 09, 2019 2:30:26 PM
Posts: 1,168, Visits: 9,892
P0299 is underboost iirc?

Firstly, suggest you take it out of the garage that have fitted all those shiny bits for you and get it into someone who can diagnose properly.

it needs actual boost mapping against desired on a run and then when the boost isn't achieved, subsequent tests to find why.

Could be anything from a blocked intake to a vac pipe leak and before the garage sells you a new DPF that doesn't cure it, I would look for someone who specialises in diagnostics.
Monday, August 03, 2015 10:55:55 AM by RichTT
K And R
 Posted Monday, August 03, 2015 9:12:13 AM
Forum Master Technician

Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)Forum Master Technician - (15,076 reputation)

Group: Moderators
Last Active: 10 hours ago
Posts: 12,908, Visits: 90,654
James

NEW turbo ? or a re-con and by whom ? and are those other parts genuine VW ?

I would think you would be very lucky to find some-one who will diagnose the problem correctly for a new customer (and baring in mind whats

already been tinkered with) by friday.

Kev


"If you dont KNOW how it works, don,t try to test or fix it"
jammyjambo
 Posted Monday, August 03, 2015 9:29:41 AM
Saturday Job

Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)

Group: Awaiting Activation
Last Active: Friday, July 29, 2016 2:53:12 AM
Posts: 8, Visits: 43
10
Cheers for the responses.

It's a genuine Garratt turbo and N75 from VW. the MAP and MAF are new Bosch parts.

The DPF measurements were fine.

Turbo boost graph comparisons , requested vs actual are as follows.. The red circle is where it goes into limp mode.
Does this look normal? Until the fault code obviously.

Robski
 Posted Monday, August 03, 2015 10:24:23 AM
Forum Master Technician

Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)

Group: Forum Members
Last Active: 27 minutes ago
Posts: 3,132, Visits: 56,663
The DPF measurements were fine.
which were ?

Has it been smoked/pressure tested ?



Rob.
Monday, August 03, 2015 11:01:33 AM by Robski
tb
 Posted Monday, August 03, 2015 6:11:23 PM
Forum Apprentice

Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)Forum Apprentice - (179 reputation)

Group: Awaiting Activation
Last Active: Friday, October 20, 2017 2:02:45 PM
Posts: 105, Visits: 3,532
179
Needs more than a smoke pro, needs their new piece of kit that can seriously pressurise, over two grand I think when I saw this at a Hickleys show, that code is under boost so it has a major leak somewhere, beyond original posters remit to sort this, unless he has the latest kit from Redline, which i doubt !!
Robski
 Posted Tuesday, August 04, 2015 2:42:32 AM
Forum Master Technician

Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)Forum Master Technician - (4,450 reputation)

Group: Forum Members
Last Active: 27 minutes ago
Posts: 3,132, Visits: 56,663
>>> Needs more than a smoke pro, needs their new piece of kit that can seriously pressurise, over two grand I think when I saw this at a Hickleys show, that code is under boost so it has a major leak somewhere, beyond original posters remit to sort this, unless he has the latest kit from Redline, which i doubt !! <<<

Yes it needs more than 'just' a smoker. I use a BluePoint smoke machine + another tool kit so I can smoke & pressure test.

It will be out of OP's remit but I never asked if 'he' had smoked/pressure tested I asked if 'it' had been ...............

The new Redline would be nice but not 100% necessary.


Rob.
columbo
 Posted Friday, August 14, 2015 5:33:42 AM
Forum Technician

Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)Forum Technician - (333 reputation)

Group: Forum Members
Last Active: Wednesday, October 09, 2019 6:04:54 AM
Posts: 278, Visits: 328
333
look through the lower part of the front bumper and see if the intercooler has a split in it. I have changed quite a few.

good luck




oh and one more thing.............give it a wash.
Crasher
 Posted Monday, August 17, 2015 8:16:24 AM
Forum Master Technician

Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)Forum Master Technician - (4,189 reputation)

Group: Advanced Members
Last Active: Yesterday @ 2:28:58 PM
Posts: 3,525, Visits: 5,976
So this van has a BPC code engine? Check the vacuum system arrangement and make sure that you can pull a vacuum by disconnecting the hose to the servo pipe and applying a vacuum to it.



Vile Invention

Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

W.H. Auden (1907-1973), A Curse:


jammyjambo
 Posted Tuesday, July 19, 2016 3:12:05 AM
Saturday Job

Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)Saturday Job - (10 reputation)

Group: Awaiting Activation
Last Active: Friday, July 29, 2016 2:53:12 AM
Posts: 8, Visits: 43
10
Thanks for your replies.

A year on and it's still no better.
It's had the MAP(inlet pressure sensor), MAF(Mass airflow meter), turbo, turbo controller valve, injectors rebuilt, intercooler.
Smoke and then pressure tested.

What about the tandem pump, if this isn't creating enough vacuum could this cause the N75 to not work properly?
There does appear to be a bit less brake servo assist than there used to be so might be related.......

Anyone heard of these causing issues?

James

Reading This Topic

Expand / Collapse

Back To Top