AGR Value Too High: Troubleshooting Guide

Hello,
It's a 2004 Sharan with a 1.9L AUY engine.

Autoscan:

Sunday, March 31, 2013, 1:30:20:45017 PM.
VCDS version: DRV 11.11.5
Data as of: 20130111.



"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein perfekter Tag für einen Spaziergang."
"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein perfekter Tag für einen Spaziergang."


Vehicle type: 7M - VW Sharan I
Scan: 25 01 02 03 08 09 15 16 17 18 19 22 29 35 36 37 39 45 55 56
76

Vehicle Identification Number (VIN): WVWZZZ7MZ4V009xxx Mileage: 147,190 km
"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 25: Immobilizer
Label file: DRV\7M3-953-257.lbl
Part number: 7M3 953 257.
Component: IMMO 0008
Coding: 00003
Operating number: WSC 00199
VCID: F6E6F558D26864A88B0
WVWZZZ7MZ4V009640 VWZ1Z0C2564690

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 01: Engine Control Module
Label file: DRV\038-906-019-AJM.lbl
Part number: 038 906 019 LQ
Component: 1.9L R4 EDC G001SG 1594
Encoding: 00002
Operating number: WSC 00020
VCID: 71EC46443B06C390DE2
WVWZZZ7MZ4V009640 VWZ1Z0C2564690

Two error codes found:
16705 - Motor speed sensor (G28).
P0321 - 35-00 - Implausible signal.
18080 - Cooler fan control 1.
P1672 - 35-10 - Short to ground / Open circuit - Intermittent.
Readiness: 0 0 X X X

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 03: Brake Electronics
Label file: DRV\7M3-907-37x-ESP-F.clb
Part number: 7M3 907 379 E
Component: ESP FRONT MK25 0102
Encoding: 0006154
Operating number: WSC 00020 000 00000
VCID: 3F88D07C6DD265E0186

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 08: Climate Control/Heating Unit. Label file: DRV\7M3-907-040.lbl
Part number: 7M3 907 040 E.
Component: CLIMATRONIC MPV GP 0005.
Encoding: 00030
Operating number: WSC 00020
VCID: 306A8340F08C8A9891C

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 09: Central Electronics
Label file: DRV\7M3-962-258.lbl
Part number: 7M3 962 258 AD.
Component: Multifunction Unit 0001.
Encoding: 04113
Operating number: WSC 00020
VCID: 7CF267706C44BEF87D4

"One error found:"
00977 - Left and right low beam headlights.
28-00 - Short circuit to positive terminal.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 15: Airbag
Label file: DRV\6Q0-909-605-VW5.lbl
Part number: 1C0 909 605.
Part number: 1D AIRBAG VW51 0L 0008.
Encoding: 12612
Operating number: WSC 00020
VCID: E1CCB6046BE6F310CE2

"One error found:"
00532 - Power supply voltage.
07-10 - Signal too weak - Intermittent.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 16: Steering wheel electronics
Label file: DRV\1J0-907-487-A.lbl
Part number: 1J0 907 487 B
Component: Steering wheel electronics 0002.
Coding: 00008
Operating number: WSC 00000
VCID: 306A8340F08C8A9891C

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 17: Control panel module
Label file: DRV\7Mx-920-xxx-17.lbl
Part number: 7M3 920 840 N
Component: VDO V59 COMBINATION INSTRUMENT.
Encoding: 13111
Operating number: WSC 00000
VCID: 3C72A7702CC47EF83D4

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 18: Auxiliary heater
Label file: DRV\7M3-815-071.lbl
Part number: 7M3 815 071 A
Component: HEATING SYSTEM B/D5W 0001
VCID: 2E569D38EAB89C68830

"One error found:"
01410 - Heater overheating.
06-00 - Signal too large.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 19: Diagnostic interface
Label file: DRV\6N0-909-901-19.lbl
Part number: 6N0 909 901.
Component: Gateway <-> CAN bus 0001.
Encoding: 00006
Operating number: WSC 00020
VCID: F0EAC340B00C4A9851C

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 56: Radio Label file: DRV\1J0-035-15x-56.lbl
Part number: 1J0 035 152 F
Component: Radio BNO 0006
Coding: 00003
Operating number: WSC 00020
VCID: 214C7604AB6633100E2

"One error found:"
00852 - Front speakers.
36-10 - Interruption - Occasional/Sporadic.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein wunderschöner Tag."

"The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze is blowing through the grass. It's a beautiful day."
Address 76: Parking Assist
Label file: DRV\7M3-919-283.lbl
Part number: 7M3 919 283.
Bauteil: Parkingsyst. SH RDW D02
Encoding: 00117
Operating number: WSC 00020
VCID: F7F8F85CD5621DA0906

No error codes found.

Sure, here is the translation of the text from German to English:

"End"

The errors from the MSTG could be deleted.



Address 01: Engine Control Module (038 906 019 LQ)

13:37:18 Block 003: Exhaust gas recirculation (EGR).
903 RPM - Motor speed (G28)
250.0 mg/H - Exhaust Gas Recirculation (Target Value)
372.4 mg/H Exhaust Gas Recirculation (Actual Value)
84.5% Magnet valve (N18), exhaust gas recirculation.

13:37:18 Block 010: Air quality parameters.
372.4 mg/H Air mass (actual value)
969.0 mbar - Atmospheric pressure.
948.6 mbar - Boost pressure (actual value)
0.0% accelerator pedal position.

What concerns me is the increased actual value of the EGR system.
Can the EGR and intake manifold be cleaned (while they are removed)?
what has been done to get close to the target value?

What does a value of 84.5% for the magnetic valve (N18) exhaust gas recirculation indicate?

Thank you in advance for your answers.

Hi there,
Is that correct regarding block 3, value 2, and value 3 – exhaust gas recirculation? Shouldn't those be the values for target air mass and actual air mass?
With this setting, you won't have excessive exhaust gas recirculation, but currently it's a bit low, depending on the operating conditions. This also corresponds to an increased duty cycle for the EGR valve.
Do you have any problems, or did you just happen to come across these values?
hg
Herbert.

Good morning, Herbert.

I stumbled upon these values by chance.
However, the actual value should not deviate from the target value by more than 20% (according to VCDS).

The exhaust gas recirculation rate controlled by the solenoid valve (N18) is also too high; according to VCDS, it should be a maximum of 70%.

andy1609 wrote:

13:37:18 Block 003: Exhaust gas recirculation (EGR). 903 RPM - Motor speed (G28) 250.0 mg/H - Exhaust Gas Recirculation (Target Value) 372.4 mg/H Exhaust Gas Recirculation (Actual Value) 84.5% Magnet valve (N18), exhaust gas recirculation. 13:37:18 Block 010: Air quality parameters. 372.4 mg/H Air mass (actual value) 969.0 mbar - Atmospheric pressure. 948.6 mbar - Boost pressure (actual value) 0.0% accelerator pedal position.

372 mg of air is approximately the value with the EGR completely deactivated.
You might have a hardware issue related to the AGR (Automatic Geographic Referencing) system.

Please generate a roughly 1-minute MWB3 log of a partial load driving scenario up to approximately 50 km/h, with engine speeds below 2500 rpm. Assuming the hardware is functioning correctly, the actual value should follow the target value.

Thank you, Ulf, I will do that.

Best regards, Andy.

Here's the log file:

The AGR operates in the partial load range.
Is it possible for the EGR system to only be active at idle speed when the engine is at operating temperature (with a coolant temperature of at least 80°C)?

Edit Admin: Data clutter deleted. What's the problem with leaving a file as it is before uploading it?

andy1609 wrote:

Here is the log file:

Inside, columns and decimal places are separated by semicolons, which makes it impossible to open the file in a meaningful way.
If you have it in a usable Excel format (xls), please upload it.

Quote:

In the partial load range, the EGR system operates. Is it possible that the EGR system is only active at idle speed when the engine is at operating temperature (minimum 80°C coolant temperature)?

It's quite possible. The conditions for EGR being active or inactive can be applied in a rather complex way with the EDC15 system.

However, as far as I know, when the "AGR is not active," you don't see the TV (presumably referring to a display or indicator), which is what the EGR valve would actually be trying to open.
Therefore, I suspect that the hardware may not have been functioning correctly during your initial data collection.

Quote:

372 mg of air is approximately the value with the EGR completely deactivated.

"You need to show me how that's calculated. That value is pretty much the same as the EGR target value listed in the EGR map for many older 1.9 TDI engines."

I had a reading of 465-480 mg/H with the AGR (Automatic Guided Rail) system disabled.

I don't see any problems in the area of AGR (automatic transmission control) here. The "values" that VCDS suggests as ranges are just guidelines for people who aren't sure where the upper and lower limits are.

Sure, here is the translation of the text from German to English:

"Hello."

Quote:

I had a reading of 465-480 mg/H with the EGR disabled

.

And I thought that the :wink:Delta (AGR on/off) is what matters to assess the function of the AGR approximately.
So, are these estimates provided as an index without any guarantee?

Blackfrosch wrote:

Quote: 372 mg of air is approximately the value with the EGR completely deactivated. You need to show me the calculations for that. It's pretty much exactly the EGR target value that's specified in the EGR map for many older 1.9 TDI engines. I measured it with the AGR deactivated at 465-480 mg/H

. In the BUK, it's significantly lower in both acceleration and idle (see attachment), although still slightly more than the 372 mg of the TS.

Quote:

13:37:18 Block 003: Exhaust gas recirculation (EGR). 903 RPM motor speed (G28). 250.0 mg/H Exhaust Gas Recirculation (Target Value) 372.4 mg/H Exhaust Gas Recirculation (Actual Value) 84.5% Magnetic valve (N18) Exhaust gas recirculation

"250mg target, 372mg actual (=120mg deviation, but only ~50mg below my acceptable range for AGR defects), and 85% AGR TV (total value) definitely indicate a faulty AGR to me."

Doesn't the EGR control function in a similar way to the injector adjustment and turbocharger boost pressure control, meaning that high percentage values correspond to a low average value of the PWM signal? And therefore, is there very little inclination for the MSG (Mean Squared Gradient) to detect the EGR under the given operating conditions?
Or, to put it another way, is the EGR valve okay? How about a test of the actuator?
hg
Herbert.

Herbert wrote:

Isn't it the case that the EGR control functions like the injector adjustment control and the turbocharger pressure regulation control, i.e., high percentage values = lower average value of the PWM signal?

In the EDC15: no. In that system, 100% LD-TV means a de-energized N75 valve, but 100% EGR-TV means a fully open EGR valve; therefore, the actual lambda value should be significantly below the target value rather than above it.

No, the EGR valve is not operated in reverse. 80% EGR means A LOT of exhaust gas and VERY little fresh air. 0% EGR means -> EGR deactivated.

Sure, here is the translation of the text from German to English:

"Hello."