C6 Fault Code P023E

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ds21h
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C6 Fault Code P023E

Post by ds21h »

Hello I have C6 from 2009 with the 2.2 Hdi engine and auto box.

It currently has the EML on and shows only 1 fault code P023E which I believe is pressure sensor 2.

From cold the car will run fine but once warm it looses power and will not pass 2500 rpm.

Does anyone have a diagram or a link to show where the sensor is located and possibly a part number please.?

Happy to donate to keep this excellent site going.

Many thanks

Mark
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Re: C6 Fault Code P023E

Post by wheeler »

What is your reg no or last 8 digits of VIN?
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Re: C6 Fault Code P023E

Post by MGmike »

Mark,
P023E Turbo pressure signal (turbo 2) : Coherence between the 3 pressure sensors
This might be a tuff one to track down. The code suggests it could be one of three sensors!
Your C6 will be the bi-turbo and if the fault is on the second turbo it's not a great surprise it only happens after warming up.
ds21h
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Posts: 44
Joined: 21 Apr 2014, 10:54
Location: Ruffec France
My Cars: 2013 C5 X7 2.2 HdI 200CH Exclusive Tourer
2013 DS 3 1.6 Hdi 90CH
2009 C6 2.2 Hdi 173 CH Auto
1973 D Super 5
1973 D Super 5 being restored
1969 2CV AK 350
1966 2CV AK 350 to restore

Past vehicles
1951 11 BL
1966 DS 21 Pallas LHS
1971 D Super
1972 DS 20 Pallas
1974 DS 23 Pallas
1981 CX GTi 2.4
1983 CX GTi 2.4
1989 CX DTR Turbo 2
1989 XM 2.0i
1994 XM 2.0i SX
1995 XM 2.5 VSX Estate
1998 XM 2.1 EXCLUSIVE
1998 Xantia 2.1 HDI Estate
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2000 XM 3.0 V6 Petrol EXCLUSIVE
2002 C5 2.0 hpi EXCLUSIVE Estate
2010 C5 X7 2.0 HDi 140 Millenium Tourer
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Re: C6 Fault Code P023E

Post by ds21h »

Hi last 8 digits of chassis number

9L562044

Thanks
Mark
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Re: C6 Fault Code P023E

Post by GiveMeABreak »

I've put this circuit diagram up as a vector graphic to help in your deliberations - so should maintain resolution when scaled.

So you have the DW12BTED4 Twin Turbo - here's the Injection Diagram for you and the location of certain components:

You can look up the codes of the hardware on our wiki that has most of them in sections in Ascending order:

Electrical Component Codes - Wiki

Injection
Image


Location
Image
Please Don't PM Me For Technical Help

Marc
ds21h
Donor 2023
Posts: 44
Joined: 21 Apr 2014, 10:54
Location: Ruffec France
My Cars: 2013 C5 X7 2.2 HdI 200CH Exclusive Tourer
2013 DS 3 1.6 Hdi 90CH
2009 C6 2.2 Hdi 173 CH Auto
1973 D Super 5
1973 D Super 5 being restored
1969 2CV AK 350
1966 2CV AK 350 to restore

Past vehicles
1951 11 BL
1966 DS 21 Pallas LHS
1971 D Super
1972 DS 20 Pallas
1974 DS 23 Pallas
1981 CX GTi 2.4
1983 CX GTi 2.4
1989 CX DTR Turbo 2
1989 XM 2.0i
1994 XM 2.0i SX
1995 XM 2.5 VSX Estate
1998 XM 2.1 EXCLUSIVE
1998 Xantia 2.1 HDI Estate
2000 XM 2.5 EXCLUSIVE
2000 XM 3.0 V6 Petrol EXCLUSIVE
2002 C5 2.0 hpi EXCLUSIVE Estate
2010 C5 X7 2.0 HDi 140 Millenium Tourer
x 4

Re: C6 Fault Code P023E

Post by ds21h »

Thanks Marc, I'll have a read this evening.
wheeler
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Re: C6 Fault Code P023E

Post by wheeler »

There are 2 different pressure sensors listed. You could disconnect each one in turn with the ignition on & see if the fault code comes up with sensor 1 or sensor 2 to confirm which is which.
Attachments
C6.jpg
MGmike
Posts: 142
Joined: 29 Aug 2020, 18:29
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Plus many MG's from 58 to 97
Oh and a Jag XK8!
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Re: C6 Fault Code P023E

Post by MGmike »

Marc, Wheeler, great info, I know where to come if I need diagrams/parts info, thanks.

Mark,
Having looked at the diagrams, I'm going to stick my neck out and say it's a MAF (air flow meter) fault! I would try Wheeler's suggestion to see it the error can be "forced" or if a different code is created but I'm heading to a MAF error which are notoriously difficult to pin down (and even more difficult to find a good replacement without paying Citroen stealer prices).

Please let us know how you get on...
ds21h
Donor 2023
Posts: 44
Joined: 21 Apr 2014, 10:54
Location: Ruffec France
My Cars: 2013 C5 X7 2.2 HdI 200CH Exclusive Tourer
2013 DS 3 1.6 Hdi 90CH
2009 C6 2.2 Hdi 173 CH Auto
1973 D Super 5
1973 D Super 5 being restored
1969 2CV AK 350
1966 2CV AK 350 to restore

Past vehicles
1951 11 BL
1966 DS 21 Pallas LHS
1971 D Super
1972 DS 20 Pallas
1974 DS 23 Pallas
1981 CX GTi 2.4
1983 CX GTi 2.4
1989 CX DTR Turbo 2
1989 XM 2.0i
1994 XM 2.0i SX
1995 XM 2.5 VSX Estate
1998 XM 2.1 EXCLUSIVE
1998 Xantia 2.1 HDI Estate
2000 XM 2.5 EXCLUSIVE
2000 XM 3.0 V6 Petrol EXCLUSIVE
2002 C5 2.0 hpi EXCLUSIVE Estate
2010 C5 X7 2.0 HDi 140 Millenium Tourer
x 4

Re: C6 Fault Code P023E

Post by ds21h »

Hello again finally received a new sensor fig 21 on the previous diagram and deleted the code.

All is fine for about 1 minute then the EML comes on again and the same code.

I don't appear to have any vaccum at the pipe on the rear of the sensor I have replaced, does anyone have a diagram of where this vaccum pipe goes to as I cannot trace its route.

I have tried to swap the sensor from the first turbo, fig 15 but the sensor is not the same.

Many thanks

Mark
ds21h
Donor 2023
Posts: 44
Joined: 21 Apr 2014, 10:54
Location: Ruffec France
My Cars: 2013 C5 X7 2.2 HdI 200CH Exclusive Tourer
2013 DS 3 1.6 Hdi 90CH
2009 C6 2.2 Hdi 173 CH Auto
1973 D Super 5
1973 D Super 5 being restored
1969 2CV AK 350
1966 2CV AK 350 to restore

Past vehicles
1951 11 BL
1966 DS 21 Pallas LHS
1971 D Super
1972 DS 20 Pallas
1974 DS 23 Pallas
1981 CX GTi 2.4
1983 CX GTi 2.4
1989 CX DTR Turbo 2
1989 XM 2.0i
1994 XM 2.0i SX
1995 XM 2.5 VSX Estate
1998 XM 2.1 EXCLUSIVE
1998 Xantia 2.1 HDI Estate
2000 XM 2.5 EXCLUSIVE
2000 XM 3.0 V6 Petrol EXCLUSIVE
2002 C5 2.0 hpi EXCLUSIVE Estate
2010 C5 X7 2.0 HDi 140 Millenium Tourer
x 4

Re: C6 Fault Code P023E

Post by ds21h »

Hello, found the fault, it was a broken vaccum pipe at the back of the engine, all fixed now.

Thanks for all the input.
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