508 GT - P0299 Turbocharger pressure regulation fault

This is the Forum for all your Peugeot Technical Questions, Problems or Advice.

Moderator: RichardW

Post Reply
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

Hi folks,

I have a 2011 508 GT 2.2HDI and for the past few days not been feeling the GT factor, it feels if though the car is restricted. There are no warning lights and the car runs fine otherwise.

I have scanned the Engine ECU with Daigbox and found the P0299 Turbocharger pressure regulation fault.

Fault code details:
Atmospheric Pressure is 20995 mbar
Turbocharging Pressure is 2420 mbar
Turbocharger Pressure Setting is 30218 mbar
Accelerator Pedal Position is 132%
Airflow is 296 mg/impulse

I have cleaned both the Air Temperature and Air Pressure Sensors on the intake manifold (both were oily) but still no luck.

Please can someone give me pointers as to where to start from.

Thanks in Advance
Hell Razor5543
Donor 2023
Posts: 13727
Joined: 01 Apr 2012, 09:47
Location: Reading
My Cars: C5 Mk2 VTX+ estate.
x 2993

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by Hell Razor5543 »

Hi, and :welc: to the Forum,

Something that will help is if you post up the VIN here (which will, for security reasons, be obscured so only forum staff can read it). Then Forum staff can look up your vehicle, and then see exactly WHAT your vehicle had when she rolled out of the factory.
James
ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
Ex C5 2.0HDi VTR
Ex C5 2.0HDi VTR

C5 2.2HDi VTX+
Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

Thanks James

Its VF3**************[VIN obfuscated, can be read by forum staff].

Appreciate your help
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by GiveMeABreak »

scotcruz wrote: 26 Sep 2020, 21:01 Hi folks,

I have a 2011 508 GT 2.2HDI and for the past few days not been feeling the GT factor, it feels if though the car is restricted. There are no warning lights and the car runs fine otherwise.

I have scanned the Engine ECU with Daigbox and found the P0299 Turbocharger pressure regulation fault.

Fault code details:
Atmospheric Pressure is 20995 mbar
Turbocharging Pressure is 2420 mbar
Turbocharger Pressure Setting is 30218 mbar
Accelerator Pedal Position is 132%
Airflow is 296 mg/impulse

I have cleaned both the Air Temperature and Air Pressure Sensors on the intake manifold (both were oily) but still no luck.

Please can someone give me pointers as to where to start from.

Thanks in Advance
Ok, so you have the DW12C engine with Bosch Injection ECU.
Fault Code: Fault P0299 the Charge pressure regulation: Air pressure below the reference value.

Description of Fault: It happens where there is a positive discrepancy of 300 to 600 mbar between the turbo pressure setting and the turbo pressure measured (for at least 5 seconds). It occurs during Turbocharger pressure regulation.

Conditions for Fault to clear: 3 decelerations passing through these conditions, without a recurrence

Downgrade Modes whilst Fault is active: When this code is active the Turbo is changed to "controlled turbo" mode. which is probably why it has lost some welly.

Also, there is deactivation of the vehicle cruise control, until the disappearance of the fault. It will reset when the fault disappears and you can use it again - until the fault reoccurs again though. Forced DPF regeneration is also prohibited via the diagnostic tool whilst he fault is active.

The Engine Management Light will also come on.

Symptoms: Noise
Smoke from the exhaust
Lack of power
Jerking/stalling
Starting problem
Fluid leak/smells (diesel fuel, oil, etc.)
Engine overheating with illumination of the engine coolant temperature indicator light
Diesel fuel consumption a bit higher
Unwanted acceleration

Suspect Areas: Turbocharging pressure sensor
Oil sump
Lubrication circuit of the turbocharger
Oil strainer
Air flow meter
Air cleaner
Engine oil
Air line between turbocharger and mixers
Air line between mixer and engine
Oil pump
Turbocharger air cooler
Turbocharger
Position indicator of the turbocharger
Exhaust gas recycling valve
Exhaust gas recirculation valve repeat
Electrical harness
Connector
Please Don't PM Me For Technical Help

Marc
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

Thank you.. thats a long list but good starting point.

I have cleaned the MAF too.. so would need to check the live readings. Any idea where I can get the standard readings of the sensors involved for what does good look like?

Also, I have been looking at the diagrams on service box but cannot locate the turbocharging pressure sensor? Just need to start from the top of the list and go through process of elimination.

In the meantime, if anyone has got ideas so I can focus on the possible cause, it will be greatly appreciated.
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

I have checked the turbo readings.

Turbocharging pressure reference value us 1043 mbar
Turbocharging pressure measured is 990 mbar
Atmospheric pressure is 1005 mbar

This was at Idle.. does that mean turbocharger boost valve is faulty?
User avatar
xantia_v6
Forum Admin Team
Posts: 9053
Joined: 09 Nov 2005, 22:03
Location: France or NewZealand
Lexia Available: Yes
My Cars: -
1997 Citroen Xantia V6 (France)
1999 Citroen XM V6 ES9 (France)
2011 Peugeot 308 CC THP 155 (NZ)
1975 Jaguar XJ-S pre-HE (NZ)
x 825

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by xantia_v6 »

You can't tell much at idle, as the ECU is not requesting any significant boost. You need to put some load on the engine to get the reference value a bit higher.
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

OK, so after cleaning the Turbocharger boost sensor and clearing the code at the weekend, I have driven the car and scanned twice and the fault hasn't appeared again? Although the car is still sluggish.. its not the limp mode as I am getting the revs but not the GT umph..

Any thought?

I will do a forced regeneration on my drive on Thursday (rain tomorrow) and revert
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

So the regeneration takes place as it should. (I had to delete the P0299 code to let regeneration take place)

I have noticed that the P0299 only shows up when the car is driven over 2500 rpm (definitely at 3000rpm)

Any idea what vacuum pipes I need to check? I noticed that the hoses to the intercooler is a bit loose.. is this meant to be loose? The top ones which are not the typical screw on ones are also loose (looks like they are loose by design)

Please can someone help?
Nicolastah
Posts: 2
Joined: 15 Mar 2021, 09:46
Location: Yvelines
My Cars: Peugeot 508 GT 2.2 hdi 204 cv
x 1

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by Nicolastah »

Salut à toi,

J'ai le même soucis que toi sur ma 508 GT.

Je souhaiterais savoir si tu as résolu le problème et qu'est ce que tu as fait du coup ?

Merci
Nicolastah
Posts: 2
Joined: 15 Mar 2021, 09:46
Location: Yvelines
My Cars: Peugeot 508 GT 2.2 hdi 204 cv
x 1

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by Nicolastah »

Hi to you, I have the same concern as you on my 508 GT. I would like to know if you solved the problem and what did you do suddenly? Thank you
User avatar
xantia_v6
Forum Admin Team
Posts: 9053
Joined: 09 Nov 2005, 22:03
Location: France or NewZealand
Lexia Available: Yes
My Cars: -
1997 Citroen Xantia V6 (France)
1999 Citroen XM V6 ES9 (France)
2011 Peugeot 308 CC THP 155 (NZ)
1975 Jaguar XJ-S pre-HE (NZ)
x 825

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by xantia_v6 »

Nicolastah wrote: 15 Mar 2021, 10:16 Hi to you, I have the same concern as you on my 508 GT. I would like to know if you solved the problem and what did you do suddenly? Thank you
Which engine does your car have?
Have you any diagnostic read-outs?
danutztimo
New User
Posts: 1
Joined: 04 Oct 2020, 21:55
Location: Cluj-Napoca
My Cars: Citroen C5 X7 2.2 HDI Exclusive

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by danutztimo »

Hello,

I have the same issue with my Citroen C5 2.2 hdi 204 hp. I changed the electronic actuator but no luck. The strangest thing is that sometimes the turbo works but only at higher revs (above 2500). The turbo gives no symptoms: no whistling, no smoke.

Has anyone figured out the issue?

Next week I will try other things and will post here if I manage to fix this mystery.
andrei_jad
Posts: 4
Joined: 28 Oct 2015, 13:08
Location: Hereford, UK
My Cars: Peugeot 508 GT 2.2HDI 204BHP

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by andrei_jad »

Any updates please? Same issue with my 508 GT..2.2hdi version. Thank you all
scotcruz
Posts: 17
Joined: 26 Sep 2020, 20:52
Location: Scotland
My Cars: Citroen C4 1.6Hdi
x 2

Re: 508 GT - P0299 Turbocharger pressure regulation fault

Post by scotcruz »

No update really.. with that and the oil leaks I got fed up and sold the car.
Post Reply