Hi guys
My 2011 (2010) V6 TDI 7P5 Treg is showing off it''s orange engine warning light with the EGR P0401 Insufficiant flow error.
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Address 01: Engine (J623-CASA) Labels:. 059-907-401-V2.clb
Part No SW: 7P0 907 401 HW: 7P0 907 401
Component: 3.0TDI EDC17 H17 0011
Revision: 51H17---
Coding: 292A401A237E01020000
Shop #: WSC 35618 001 1048576
ASAM Dataset: EV_ECM30TDI0117P0907401 002013
ROD: EV_ECM30TDI_VW52.rod
VCID: 6CD64C99873E1224EB-8038
1 Fault Found:
4807 - EGR System
P0401 00 [096] - Insufficient Flow
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 155500 km
Date: 2019.07.20
Time: 11:00:20
Engine speed: 1734.50 /min
Normed load value: 59.2 %
Vehicle speed: 50 km/h
Coolant temperature: 75 °C
Intake air temperature: 27 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.540 V
Unlearning counter according OBD: 39
Mean injection quantity: 22.24 mg/stroke
Control Module temperature: 29.6 °C
EGR_governor_deviation: -187.1 mg/stroke
Inj Ctl q Curr: 22.39 mg/stroke
Mass_air_flow_sensor_drift: 1.2413
Air_Flow_Rate_from_Mass_Air_Flow_Sensor_kg_h: 184.8 kg/h
Actual charge pressure: 1413 hPa
Readiness: 0 0 0 0 0
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So far I've replaced the the EGR with a brand new one , Pierburg (the old one didn't look too bad though), cleaned the EGR pipe to the intake manifold (good flow), cleaned the small gap in the bottom of manifold that actually brings in the air from the EGR pipe (crazy placement, built for clogging.!), cleaned the intake valve. I also tried the EGR cleaning fluids (diesel additive), and also did the wallpaper steamer trick.
Looking at the error above I see the the EGR_governor_deviation: -187.1 mg/stroke is kind of closing of the Air_Flow_Rate_from_Mass_Air_Flow_Sensor_kg_h: 184.8 kg/h
I'm getting ready to rip off and clean the whole manifold with blow torch and pressurised air, but after the cleaning I've done the car feels so much better and much more "snappier" than before.
Do anyone of you know how to interpret the error above? It seems to me that maybe something else might be wrong? Something that prevents EGR totally? Faulty EGR censor? Vacuum?
I'd appreciate any guidance for more troubleshooting here. Should I check more around vacuum? Any other censors? I clear the code, but it keeps coming back pretty often now.
Getting a bit frustrated now ](*,)
Here's a video of a VCDS monitoring session:
My 2011 (2010) V6 TDI 7P5 Treg is showing off it''s orange engine warning light with the EGR P0401 Insufficiant flow error.
---
Address 01: Engine (J623-CASA) Labels:. 059-907-401-V2.clb
Part No SW: 7P0 907 401 HW: 7P0 907 401
Component: 3.0TDI EDC17 H17 0011
Revision: 51H17---
Coding: 292A401A237E01020000
Shop #: WSC 35618 001 1048576
ASAM Dataset: EV_ECM30TDI0117P0907401 002013
ROD: EV_ECM30TDI_VW52.rod
VCID: 6CD64C99873E1224EB-8038
1 Fault Found:
4807 - EGR System
P0401 00 [096] - Insufficient Flow
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 155500 km
Date: 2019.07.20
Time: 11:00:20
Engine speed: 1734.50 /min
Normed load value: 59.2 %
Vehicle speed: 50 km/h
Coolant temperature: 75 °C
Intake air temperature: 27 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.540 V
Unlearning counter according OBD: 39
Mean injection quantity: 22.24 mg/stroke
Control Module temperature: 29.6 °C
EGR_governor_deviation: -187.1 mg/stroke
Inj Ctl q Curr: 22.39 mg/stroke
Mass_air_flow_sensor_drift: 1.2413
Air_Flow_Rate_from_Mass_Air_Flow_Sensor_kg_h: 184.8 kg/h
Actual charge pressure: 1413 hPa
Readiness: 0 0 0 0 0
---
So far I've replaced the the EGR with a brand new one , Pierburg (the old one didn't look too bad though), cleaned the EGR pipe to the intake manifold (good flow), cleaned the small gap in the bottom of manifold that actually brings in the air from the EGR pipe (crazy placement, built for clogging.!), cleaned the intake valve. I also tried the EGR cleaning fluids (diesel additive), and also did the wallpaper steamer trick.
Looking at the error above I see the the EGR_governor_deviation: -187.1 mg/stroke is kind of closing of the Air_Flow_Rate_from_Mass_Air_Flow_Sensor_kg_h: 184.8 kg/h
I'm getting ready to rip off and clean the whole manifold with blow torch and pressurised air, but after the cleaning I've done the car feels so much better and much more "snappier" than before.
Do anyone of you know how to interpret the error above? It seems to me that maybe something else might be wrong? Something that prevents EGR totally? Faulty EGR censor? Vacuum?
I'd appreciate any guidance for more troubleshooting here. Should I check more around vacuum? Any other censors? I clear the code, but it keeps coming back pretty often now.
Getting a bit frustrated now ](*,)
Here's a video of a VCDS monitoring session: