OEM Number Valve relief pressure Rail System

Miguelpfdez94

Member
T6 Pro
Hello guys,


First of all, sorry for my english, i will do my best to make me understandable.

Well, i am going to tell you my story a little bit, i will try to be brief, and in case it may help someone.

My Van is a T6 2.0 150HP DSG CXFA engine code. I had it remapped by TLR Sport in Madrid having 180HP and around 440Nm.

In a trip coming back to Madrid i saw the spiral failure light. I read the failure codes with VCDS and i got P0087 OBD-II Trouble Code: Fuel Rail/System Pressure - Too Low. The Van did not loose power or showed anything strange. I stop and restarted the engineagain and the light was gone.

After some days, in another trip, going for a fast way van had to go from 6th to 4th gear due to a huge climb and the failure spiral light came again, and the van suddenly stopped. The error shown in the VCDS was P0088 OBD-II Trouble Code: Fuel Rail/System Pressure - Too High. The Van did want to start, it was something like it didnt get fuel in the rail or had some air in it (the same symtoms as when the fuel filter is changed), so, i had to purge the fuel rail to make it run again.

After looking for a little bit internet i decided to change the Fuel pressure sensor, just in case, but, unfortunately i have seen the spiral failure light again so my next step here, unless someone has a better idea ;), change the Valve pressure relief to keep chasing fix the issue.. and now comes the weird thing

I am not able to find the valve relief pressure OEM number anywhere...!!! for my engine code CXFA
1622108859961.png

So, i wonder if some of you guys know this number or at least, some place where i could search for by VIN..

Really apprecitate the help in advance
Stay safe!
Cheers!

photo_2021-05-27_10-50-09.jpg
 
Last edited:
I forgot to attach the VCDS Scan

16064 - Fuel Rail/System Pressure
P0088 00 [032] - Too High
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 190256 km
Date: 2056.01.30
Time: 21:39:37

Engine RPM: 3420.00 /min
Normed load value: 71.4 %
Vehicle speed: 99 km/h
Coolant temperature: 92 °C
Intake air temperature: 18 °C
Ambient air pressure: 930 mbar
Voltage terminal 30: 14.187 V
Unlearning counter according OBD: 27
Rail pressure regulation: status: Regulated oper. via press. ctrl valve and quant. ctrl valve
Fuel high pressure sensor: nominal value: 2007.0 bar
Fuel high pressure sensor: actual value: 2238.0 bar
Fuel high pressure: control deviation: -231 bar
RPC_Hp_control_state-HPV_Status: RPC_HP_CLOSED
RPC_Im_control_state-Status: RPC_IM_CLOSED_LOOP
HPV current demand coming from the HPV control: 1640 mA
HPV current demand coming from the IMV control: 570 mA
Mean injection quantity: 47 mg/stroke
Setpoint generation interior torque: 309.0 Nm
Release requirement for DPF regeneration: 6
Fuel temperature sensor 1: B1: raw value: 34.0 °C
Voltage terminal 30: 14.197 V
Vehicle speed: 99 km/h
Terminal 15 status: On

16114 - Fuel Rail/System Pressure
P0087 00 [096] - Too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 191073 km
Date: 2057.01.06
Time: 21:07:53

Engine RPM: 2916.25 /min
Normed load value: 98.8 %
Vehicle speed: 84 km/h
Coolant temperature: 92 °C
Intake air temperature: 45 °C
Ambient air pressure: 940 mbar
Voltage terminal 30: 14.492 V
Unlearning counter according OBD: 40
Rail pressure regulation: status: Regulated oper. via press. ctrl valve and quant. ctrl valve
Fuel high pressure sensor: nominal value: 2060.0 bar
Fuel high pressure sensor: actual value: 1505.0 bar
Fuel high pressure: control deviation: 555 bar
RPC_Hp_control_state-HPV_Status: RPC_HP_CLOSED
RPC_Im_control_state-Status: RPC_IM_CLOSED_LOOP
HPV current demand coming from the HPV control: 1670 mA
HPV current demand coming from the IMV control: 310 mA
Mean injection quantity: 83 mg/stroke
Setpoint generation interior torque: 478.1 Nm
Release requirement for DPF regeneration: 10
Fuel temperature sensor 1: B1: raw value: 50.7 °C
Voltage terminal 30: 14.502 V
Vehicle speed: 84 km/h
Terminal 15 status: On

Cheers!
 
Hi, i have the same problem on customers T6, my question is if it help to you to change the pressure regulator, thanks for answer ;)
 
Buenos dias, soy Alex, y me pasa con la multivan t6 lo mismo que a ti, a reprogramé, la desprogramé y tras sucesivos problemas con la inyeccin nantes y despus, ahora me pasa lo que tu pero con baja press solo, y creo que con calor porque en invierno casi no me ha salido, y lo llevo a la casa y no les sale fallo. lo solucionaste?
 
Be careful when going to order pressure sensor just by the Part number which is 04L130764B I have one on table and when I tried to screw it on rail it is 180° off did not ordered part based on car model just matched part number learning hard way
 
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