Code p0491 and u3501 shoud i be worried?

   #21  
superglue9009

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Is there any other way to clear CEL without clearing the DTC codes?

Thanks!
 
   #23  
superglue9009

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SaVAGeSoot said:
allow the system to self clear after sufficient self checks
Click to expand...
How long does it take for this to happen, few hours, days... and also any specific parameters needs to be met? Engine idling, driving few miles etc...

Thanks!
 
   #24  
SaVAGeSoot

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superglue9009 said:
How long does it take for this to happen, few hours, days... and also any specific parameters needs to be met? Engine idling, driving few miles etc...

Thanks!
Click to expand...
Yes to all of the above.
Different driving cycles and conditions of different things.
FF data gives you an idea of how many cycles are left until it clears once you've addressed whatever the issue causing it was.
superglue9009 said:
Unlearning counter according OBD: 27
Click to expand...
 
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   #25  
superglue9009

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Thank you for your fast reply!!

The reason I was asking this
I have dropped off the car to the dealership to diagnose the problem ( I have tried all of the testing that you guys suggested and everything was working fine) they came back with a carbon buildup, and also they did not address the issue just clear the CEL without clearing DTC. Code P0491 is still there after the scan with vcds. No CEL on dashboard. They had my car for 2-3 hours.
 
   #26  
SaVAGeSoot

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Look at your FF data... is the counter dropping or not?
 
   #27  
superglue9009

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This is the scan before going to the dealer.

Code: 
Wednesday,25,September,2024,19:42:58:15386
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 24.7.0.0 (x64) HEX-V2 CB: 0.4643.5
Data version: 20240715 DS356.3
www.Ross-Tech.com
VIN: 3VV4B7AX8MM067871 License Plate: 9.25
Mileage: 110367km-68578mi Repair Order:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Chassis Type: AX-VW37 (3Q0)
Scan: 01 02 03 05 08 09 10 13 15 17 19 22 29 36 39 3C 42 44 47 4B
          52 5F 6C 6D 75 A5 BB BC CA D6 D7
VIN: 3VV4B7AX8MM067871 Mileage: 110367km-68578miles
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
13-Auto Dist. Reg -- Status: OK 0000
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
29-Left Light -- Status: Malfunction 0010
36-Seat Mem. Drvr -- Status: OK 0000
39-Right Light -- Status: OK 0000
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
47-Sound System -- Status: OK 0000
4B-Multifunc. Module -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
75-Telematics -- Status: OK 0000
A5-Frt Sens. Drv. Assist -- Status: OK 0000
BB-Door Rear Drv -- Status: OK 0000
BC-Door Rear Pass -- Status: OK 0000
CA-Sunroof -- Status: OK 0000
D6-Light Ctrl Left 2 -- Status: OK 0000
D7-Light Ctrl Right 2 -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-DTEA) Labels:. 06L-907-115-V1.clb
   Part No SW: 83A 907 115 F HW: 06L 907 309 B
   Component: R4 2.0l TFSI H31 0002
   Revision: 1DH31000 CVN: 50917987
   Coding: 012A00122466012FB4000000000000000000000000000000
   Shop #: WSC 00066 790 00452
   ASAM Dataset: EV_ECM20TFS01183A907115F 001004
   ROD: EV_ECM20TFS01183A907115F.rod
   VCID: 290825E8997AE3E228D-807C
   VINID: 0E698448746821D74018720704C0D5FB53
1 Fault Found:
7654 - Secondary Air Injection System: Bank 1
          P0491 00 [10101111] - Insufficient Flow
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 110287 km
                    Date: 2024.09.25
                    Time: 17:39:31
                    Engine RPM: 1213.00 /min
                    Normed load value: 20.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 27 C
                    Intake air temperature: 22 C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 14.300 V
                    Unlearning counter according OBD: 40
                    Engine status: COENG_RUNNING
                    Engine status-Test_Program_Co Eng st COMPU VERB UBYTE: 3
Readiness: 0000 0000
 
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   #28  
superglue9009

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After the dealer visit scan

Code: 
Saturday,28,September,2024,13:59:40:15386
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 24.7.0.0 (x64) HEX-V2 CB: 0.4643.5
Data version: 20240715 DS356.3
www.Ross-Tech.com


VIN: 3VV4B7AX8MM067871 License Plate: 9.28.24
Mileage: 110459km-68636mi Repair Order:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Chassis Type: AX-VW37 (3Q0)
Scan: 01 02 03 05 08 09 10 13 15 17 19 22 29 36 39 3C 42 44 47 4B
          52 5F 6C 6D 75 A5 BB BC CA D6 D7
VIN: 3VV4B7AX8MM067871 Mileage: 110459km-68636miles
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
13-Auto Dist. Reg -- Status: OK 0000
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
22-AWD -- Status: OK 0000
29-Left Light -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
39-Right Light -- Status: Malfunction 0010
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
47-Sound System -- Status: OK 0000
4B-Multifunc. Module -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
75-Telematics -- Status: OK 0000
A5-Frt Sens. Drv. Assist -- Status: OK 0000
BB-Door Rear Drv -- Status: OK 0000
BC-Door Rear Pass -- Status: OK 0000
CA-Sunroof -- Status: OK 0000
D6-Light Ctrl Left 2 -- Status: OK 0000
D7-Light Ctrl Right 2 -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-DTEA) Labels:. 06L-907-115-V1.clb
   Part No SW: 83A 907 115 F HW: 06L 907 309 B
   Component: R4 2.0l TFSI H31 0002
   Revision: 1DH31000 CVN: 50917987
   Coding: 012A00122466012FB4000000000000000000000000000000
   Shop #: WSC 00066 790 00452
   ASAM Dataset: EV_ECM20TFS01183A907115F 001004
   ROD: EV_ECM20TFS01183A907115F.rod
   VCID: 290825E8997AE3E228D-807C
   VINID: 0E698448746821D74018720704C0D5FB53
1 Fault Found:
7654 - Secondary Air Injection System: Bank 1
          P0491 00 [01101000] - Insufficient Flow
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Priority: 2
                    Fault Frequency: 2
                    Mileage: 110287 km
                    Date: 2024.09.25
                    Time: 17:39:31
                    Engine RPM: 1213.00 /min
                    Normed load value: 20.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 27 C
                    Intake air temperature: 22 C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 14.300 V
                    Unlearning counter according OBD: 39
                    Engine status: COENG_RUNNING
                    Engine status-Test_Program_Co Eng st COMPU VERB UBYTE: 3
Readiness: 0000 0000
 
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   #30  
SaVAGeSoot

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No, frequency is increasing.... Like I said, if the issue isn't fixed, it won't go away...
 
   #31  
superglue9009

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I understand now that frequency will rise till I fix the problem., I'm CEL free for now

Let me rephrase my question

How the dealer was able to clear the CEL so quickly without clearing DTC codes?

My car was at the dealership for about two hours and they did not add any extra miles
 
   #33  
superglue9009

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Thank you sir !!
That make sense just found one for 10k lol
 
   #34  
PetrolDave

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superglue9009 said:
Thank you sir !!
That make sense just found one for 10k lol
Click to expand...
That's only the start with ODIS - there are LARGE annual fees and lots of hoops to jump through.
 
   #36  
Uwe

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superglue9009 said:
How the dealer was able to clear the CEL so quickly without clearing DTC codes?
Click to expand...
Contradictions do not exist. Whenever you think you are facing a contradiction, check your premises. You will find that one of them is wrong.

-Uwe-
 
   #37  
superglue9009

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SaVAGeSoot said:
No offense, but you can barely use VCDS.... for what purpose are you even looking up ODIS?
Click to expand...

None taken!!

I was simply looking for some answers when comes to clearing CEL using VCDS regardless of addressing the issue/ fixing the problem
 
   #38  
Uwe

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superglue9009 said:
I was simply looking for some answers when comes to clearing CEL using VCDS regardless of addressing the issue/ fixing the problem
Click to expand...
Use the Generic OBD-II function in VCDS tell us what (if any) fault codes show under Mode 3, Mode 7, and Mode 10 (the last might be called Mode 0A now).

-Uwe-
 
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