Peugeot Boxer, fault codes and turbopressure

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Gangnes Bil
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Peugeot Boxer, fault codes and turbopressure

Post by Gangnes Bil »

Hello :)

I have a Peugeot Boxer(II), 3.0 HDI - F1CE0481D, 2010, vin nr VF3**************[VIN obfuscated, can be read by forum staff]. Where motorlamp fire and turbo pressure goes on and of while driving, got some fault codes (Delphi diagnose) :

035F - Unknown fault code

2085 - Unknown fault code

P0481 - Engine fan 2, too high tempretur, periodic

P2453 - Differential pressure DPF, wrong values, periodic

U1601 - CAN-communication, not signal, permanent

And when checking values for with diagnosis
- Differential pressure / particle emission filter upstream pressure : 32768 mbar
- Temperatur particle emission filter upstream : 1271 celsius

Have been struggeling much with this car from before and checked
- Cableharness, but could not find some problems
- Fuses seems to be fine
- Voltage down to exhaust temperature from ECU is fine
- Battery, its in good condition
- Vacuum system (Turbo) - OK

and this have been recently changed :
- Vacuum regulator - turbo
- Temperatur sensor on exhust (have just found one temperatur sensor on this car, same when taking diagnosis, just show one exhaust temperature)
- Relay to engine fan
- Motor ECU and BCI module

Have heard that some of the fault codes deletes by itself while driving. But have driven the car about 200km in one day, but the car is still the same.

The ABS-lamp do also fire, but could not take diagnosis with the Delphi tester, need some adapter and another diagnosis system.


Are there anybody out there, who have some any idea about this problem ??? Are very frustrated about this car now. :roll:

Best regards
Sigbjørn
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

Hi Sigbjørn and welcome to the Forum.

I'll take a look at those codes shortly for you and see what I have.
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

Ok, unfortunately most of these faults here relate to Technical Service Bulletins (I'll send you a Private Message about these).

The P2453 one would indicate that the sensor is giving erratic or incomprehensible readings. I do know that on the Citroen Relay vans which are the same, this error was caused by the close proximity of the wiring harness to the exhaust / heat sources and this caused wearing / damage.

Have a look at this video, which although is for a Vauxhall has a similar fault I suspect:

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Re: Peugeot Boxer, fault codes and turbopressure

Post by Abdul »

Any time You want to diagnose Peugeot car and get good results use pp2000 and bring out the faults code you get results thanks
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

It's a 2010 model - it won't use PP2000 if using proprietary PSA software, it will use Diagbox.
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Re: Peugeot Boxer, fault codes and turbopressure

Post by Gangnes Bil »

Have now checked a little about this car, can not find a problem with the wiring harness to the differential sensor, but have 5v in the signal cable to the sensor (have also 5v input to sensor) ???

Wondering if possible to get pin location for Components for the EPC-unit ?
- Find those cable to differential sensor on EPC-unit, pin A54 - Power: 5v, A36 - Signal: 5v and A19: 0v (ground)
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

Sorry that's not a PSA term I recognise EPC?

What system are you referring to?
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Re: Peugeot Boxer, fault codes and turbopressure

Post by Gangnes Bil »

OK, I`m referring to engine control module (EPC - Engine Power Control Unit)
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

Engine ECU!

Ok, that's clarified it... and I think you are referring to the differential pressure sensor... I'll take a look shortly.

This is the location of the sensor while I look at the diagram for you.
Boxer A.PNG
(2) Oxygen sensor .
(3) Differential pressure sensor.
"b" Temperature sensor upstream of the catalytic converter.
"c" Pressure take-off upstream of the particle filter.
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

Ok, so here is the specific diagram relating to the Differential Pressure Sensor:

1320: Engine ECU
1341: Particle filter differential pressure sensor
1343: Downstream exhaust gas high temperature sensor
1344: Upstream Exhaust gas high temperature sensor

The bad news is that the wiring diagram does not list the wiring pin out designations, but you can at least match up the connections as shown.

Image
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Gangnes Bil
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Re: Peugeot Boxer, fault codes and turbopressure

Post by Gangnes Bil »

The pin locations are okey, so I wonder why i got 5v output from engine ECU, where I should have input signal from differential pressure… Have tried to disconnect the exhaust temperatur also, just to see if be different on values to differential pressure sensor, but same values.
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

But the supply voltage is 5V....
Diff Sesor.PNG
Pin 1 is the Output Signal.
Pin 2 is the Earth
Pin 3 of the connection to the differential pressure sensor is the supply voltage (5V)
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Gangnes Bil
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Re: Peugeot Boxer, fault codes and turbopressure

Post by Gangnes Bil »

Have 5V on pin 1 and 3 on this car. :roll:
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Re: Peugeot Boxer, fault codes and turbopressure

Post by GiveMeABreak »

Ok, that is also normal and within parameters, depending on the pressure difference:

The particle filter differential pressure sensor measures the difference in the pressure of the exhaust gases between upstream and downstream of the catalytic converter and particle filter assembly.

Function of the Differential Pressure Sensor
Diff Sensor C.PNG
(1) Particle filter differential pressure sensor.
"a" Pressure take-off upstream of the particle filter.
"b" Pressure take-off downstream of the particle filter.
"d" Sensitive membrane.
"e" Integral electronics.
The resistance of the particle filter differential pressure varies as a function of the difference between the pressure upstream of the particle filter and the pressure downstream of the particle filter (the greater the difference in pressure, the greater the resistance).

The sensitive membrane "d" receives the pressure upstream of the particle filter on its upper face and the pressure downstream of the particle filter on its lower face.
An electronic stage "e" amplifies the signal produced by the sensitive membrane "d".
Diff Sensor B.PNG
"U" Output voltage of the particle filter differential pressure sensor.

"dP" Difference in the pressure measured between upstream
and downstream of the particle filter ( bar).

The output voltage of the particle filter differential pressure
sensor is proportional to the difference in pressure between
upstream and downstream of the particle filter.
So the graph shows us that 4.5V (and there is a ± 2 to 4% tolerance of error depending on the temperature) is a valid reading. Not quite the 5V you measured.

So what you have to determine is whether the 5V on the output pin is due to a blocked DPF (higher voltage where there is higher pressure difference between downstream and upstream) or whether the wiring has been damaged by heat / is shorting out and is causing incorrect / permanent 5V on the output pin.

So a thorough check of the sensor wiring harness is recommended first of all before looking at the DPF and whether that is blocked and needs cleaning, or the sensor is faulty etc...

But as I mentioned - on this specific vehicle there was a technical bulletin because of this specific problem as I mentioned in my PM.
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Gangnes Bil
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Re: Peugeot Boxer, fault codes and turbopressure

Post by Gangnes Bil »

Okey, have to check more. The local dealer have also checked this car last Autumn, but did not have some solutions.

But do you have some idea or seen before why I have so high values on temperatur particle emission filter upstream : 1271 celsius ? And it does not regulate... Be same after change the temperatur sensor. Have also checked the wiring to this temperatur sensor, but same as the pressure sensor, can not find some problems in the wiring harness. (When last time checked.)

Have been thinking about, if this can cause the differential pressure error ? Or what do you think Marc ?

Sigbjørn
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