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Post by ryanphillips on Jun 2, 2022 10:06:58 GMT
Hi,
I have an A3 but this forum seems more active and an MQB is an MQB for the most part. I posted over there but I've had revelations since that post.
I have an issue where OBD11 and VCDS can no longer read engine codes. When using VCDS/Rosstech, when codes are pulled through the "Generic OBD" button, it pulls a misfire code. My OBD11 previously had no issue reading misfire codes but now it won't.
The car still runs great but at idle, I get a random "kick", obviously a misfire.
This has happened on 2 different engines now. Previous engine had scouring and low compression in cyl 2 so I replaced it. The generic scanned picked up a cyl 2 misfire on the new engine also. I am almost certain this is an electrical gremlin within a module at this point.
As you can see in the log I'll put in a reply below, at its worst, i get low or insufficient voltage on multiple modules. At its best, I just get this misfire at idle but I can't pull the engine codes with a proper VAG scanner, only with a generic or through the Generic OBD button on VCDS.
Any thoughts? Does it sound like a failing gateway or ECM? Thanks if you can help!
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Post by ryanphillips on Jun 2, 2022 10:08:07 GMT
OBDeleven vehicle history log
Date: 2022-05-27 21:54
VIN: WAUJ8GFF6G1081475
Car: Audi A3
Year: 2016
Body type: Saloon
Engine: CNTC
Mileage: 74357 KM
---------------------------------------------------------------
Fault
Control unit: 01 Engine
Active faults: 0
Inactive faults: 5
System description: 2.0l R4 TFSI
Software number: 5G09C0BB01
Software version: 0001
Hardware number: 06K907425B
Hardware version: H13
ODX name: EV_ECM20TFS0205G09C0BB01
ODX version: 001003
Faults:
- Unknown
Intermittent
Date: 2022-05-27 16:56:46
Mileage: 74353 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 255
Engine speed: 3807.75 1/min
Normed load value: 15.3 %
Vehicle speed: 15 km/h
Coolant temperature: 92 °C
Intake air temperature: 38 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.984 V
Dynamic environmental data: 209628110E0311800F1711DC02C1202F0E7F11EC0811DB0607132D1032
- Unknown
Intermittent
Date: 2022-05-25 05:17:27
Mileage: 74304 km
Priority: 6
Malfunction frequency counter: 1
Unlearning counter: 255
Engine speed: 848.00 1/min
Normed load value: 20.8 %
Vehicle speed: 0 km/h
Coolant temperature: 76 °C
Intake air temperature: 36 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 12.148 V
Dynamic environmental data: 20962841690000416A0005416B0001
- Unknown
static
Date: 2022-05-27 16:56:46
Mileage: 74353 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 255
Engine speed: 3703.75 1/min
Normed load value: 14.1 %
Vehicle speed: 14 km/h
Coolant temperature: 92 °C
Intake air temperature: 36 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.945 V
Dynamic environmental data: 209628110E0311800E7D11DC02C1202F0E7F11EC0211DB0607132D1032
- Unknown
Intermittent
Date: 2022-05-27 16:56:46
Mileage: 74353 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 255
Engine speed: 3703.75 1/min
Normed load value: 14.1 %
Vehicle speed: 14 km/h
Coolant temperature: 92 °C
Intake air temperature: 36 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.945 V
Dynamic environmental data: 209628110E0311800E7D11DC02C1202F0E7F11EC0211DB0607132D1032
- Unknown
Intermittent
Date: 2022-05-27 16:56:46
Mileage: 74353 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 255
Engine speed: 3703.75 1/min
Normed load value: 14.1 %
Vehicle speed: 14 km/h
Coolant temperature: 92 °C
Intake air temperature: 36 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 13.945 V
Dynamic environmental data: 209628110E0311800E7D11DC02C1202F0E7F11EC0211DB0607132D1032
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 02 Transmission
Active faults: 0
Inactive faults: 1
System description: DQ250-6A MQB
Software number: 0D9300013B
Software version: 4931
Hardware number: 02E927770AQ
Hardware version: H53
Serial number: TFK01512100122
ODX name: EV_TCMDQ250021
ODX version: 001001
Faults:
P173400 - Starter release from the selector lever sensor system
Intermittent
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 03 Brakes
Active faults: 0
Inactive faults: 1
System description: ESC
Software number: 3Q0907379AA
Software version: 0623
Hardware number: 3Q0907379F
Hardware version: H42
Serial number: 90086000015079
ODX name: EV_Brake1UDSContiMK100IPB
ODX version: 034036
Faults:
B116816 - Steering angle sensor Voltage too low
Intermittent
Date: 2022-05-25 00:34:35
Mileage: 74304 km
Priority: 2
Malfunction frequency counter: 5
Unlearning counter: 230
Extended Freeze Frames: 0007001852000000AF0000000000000010600000000010
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 08 Air Conditioning
Active faults: 0
Inactive faults: 2
System description: AC Automat
Software number: 8V0820043D
Software version: 0060
Hardware number: 8V0820043D
Hardware version: H14
Serial number: 00000000843077
ODX name: EV_AirCondiFrontVaAU37X
ODX version: 008020
Faults:
U140000 - Function restriction due to insufficient voltage
Intermittent
Priority: 6
Malfunction frequency counter: 1
Unlearning counter: 40
B10ABF0 - Refrigerant pressure Lower limit not reached
Intermittent
Date: 2022-05-25 00:34:36
Mileage: 74304 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 229
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 09 Central Electrics
Active faults: 0
Inactive faults: 2
System description: BCM MQBAB MNA
Software number: 5Q0937085AH
Software version: 0175
Hardware number: 5Q0937085AE
Hardware version: H24
Serial number: 01061601400445
ODX name: EV_BCMMQB
ODX version: 015001
Faults:
U140000 - Function restriction due to insufficient voltage
Intermittent
Date: 2022-05-22 05:48:36
Mileage: 74305 km
Priority: 6
Malfunction frequency counter: 1
Unlearning counter: 229
Terminal 15 status: Off
Terminal 50 status: Off
Voltage: 8.2 V
Outside air temperature: 10.5 °C
Status Bremslichtschalter (HW): Off
Status Bremslichtschalter (CAN): Off
Off: operated
Parking light: not activated
Automatic high beam assist: not activated
Low beam: not activated
Parking light left: not activated
Parking light right: not activated
Letzte Weckursache/ Werte [00;2E]: keine Störschutzursache
CAN-Bus_aktiv: On
B131D04 - Sirens / alarm horn for anti-theft warning system Faulty
Intermittent
Date: 2022-05-25 00:00:14
Mileage: 74304 km
Priority: 4
Malfunction frequency counter: 1
Unlearning counter: 229
Terminal 15 status: On
Terminal 50 status: Off
Voltage: 9.7 V
Outside air temperature: 20.5 °C
Status Bremslichtschalter (HW): On
Status Bremslichtschalter (CAN): On
Off: operated
Parking light: not activated
Automatic high beam assist: not activated
Low beam: not activated
Parking light left: not activated
Parking light right: not activated
Letzte Weckursache/ Werte [00;2E]: keine Störschutzursache
CAN-Bus_aktiv: On
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 15 Airbag
Active faults: 0
Inactive faults: 1
System description: AirbagVW20
Software number: 5Q0959655J
Software version: 0830
Hardware number: 5Q0959655J
Hardware version: 010
Serial number: 003GCR04935-
ODX name: EV_AirbaVW20SMEVW37X
ODX version: 002144
Faults:
U112300 - Databus error value received
Intermittent
Date: 2022-05-25 00:34:35
Mileage: 74304 km
Priority: 6
Malfunction frequency counter: 1
Unlearning counter: 230
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 16 Steering Column
Active faults: 0
Inactive faults: 0
System description: Lenks. Modul
Software number: 8V0953521FH
Software version: 0120
Hardware number: 5Q0953549E
Hardware version: 003
Serial number: 26011608490551
ODX name: EV_SMLSKLOMQB
ODX version: 020001
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 17 Dashboard
Active faults: 0
Inactive faults: 0
System description: KOMBI
Software number: 8V0920871R
Software version: 6423
Hardware number: 8V0920871R
Hardware version: H03
ODX name: EV_DashBoardVDDMQBAB
ODX version: 009051
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 19 Gateway
Active faults: 0
Inactive faults: 0
System description: GW MQB High
Software number: 5Q0907530AJ
Software version: 2246
Hardware number: 5Q0907530M
Hardware version: 212
Serial number: 24011610800442
ODX name: EV_GatewConti
ODX version: 013020
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 22 All Wheel Control
Active faults: 0
Inactive faults: 0
System description: Haldex4Motion
Software number: 0CQ907554H
Software version: 7083
Hardware number: 0CQ525130
Hardware version: H52
Serial number: HA1-00026.11.1500012181
ODX name: EV_AllWheelContrHA1VW37X
ODX version: 004013
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 2B Steering Column Lock
Active faults: 0
Inactive faults: 1
System description: ELV-MQBA
Software number: 5Q0905861A
Software version: 0120
Hardware number: 5Q0905861A
Hardware version: H01
Serial number: 16000002906003
ODX name: EV_ELVMarquMQB
ODX version: 004111
Faults:
U140000 - Function restriction due to insufficient voltage
Intermittent
Priority: 6
Malfunction frequency counter: 2
Unlearning counter: 229
ELV State: 2
Information Clamps: 8
CoCo State: e000
WFS State: 6
Vehicle speed: 655.34 km/h
Voltage: 45
AD-Value H-bridge: 22
Clamp15 flip flop, SSTx, button contacts: 9
CAN signals: 5
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 44 Steering Assistance
Active faults: 0
Inactive faults: 0
System description: EPS_MQB_ZFLS
Software number: 5Q0909144S
Software version: 1063
Hardware number: 5Q0909144R
Hardware version: 126
ODX name: EV_SteerAssisMQB
ODX version: 012140
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 52 Passenger Door
Active faults: 0
Inactive faults: 1
System description: TSG BFS
Software number: 5Q0959392E
Software version: 0041
Hardware number: 5Q0959392B
Hardware version: 020
Serial number: 241015BJO04402
ODX name: EV_DCUPasseSideEWMINKLO
ODX version: 006003
Faults:
- Unknown
Intermittent
Date: 2022-05-25 12:56:17
Mileage: 74305 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 229
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 55 Headlight Regulation
Active faults: 0
Inactive faults: 0
System description: LWR-ECU
Software number: 5Q0907357
Software version: 0080
Hardware number: 6R0907357A
Hardware version: 005
Serial number: --------------
ODX name: EV_HeadlRegulVWLWRMQB
ODX version: 001110
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 5F Multimedia
Active faults: 0
Inactive faults: 1
System description: MU-H-NS-US
Software number: 8V0035047J
Software version: 0403
Hardware number: 8V0035047B
Hardware version: H44
Serial number: A052A0G7512190
ODX name: EV_MUHig6C3HBAS
ODX version: 001040
Faults:
B11CF53 - Tuner for satellite radio Deactivated
static
Date: 2022-04-17 09:53:30
Mileage: 74041 km
Priority: 4
Malfunction frequency counter: 1
Unlearning counter: 178
Dynamic environmental data: 02867F244601010000000000
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 6C Rear View Camera
Active faults: 0
Inactive faults: 0
System description: MQB RVC Mid
Software number: 5Q0907441A
Software version: 0140
Hardware number: 5Q0907441A
Hardware version: H07
ODX name: EV_2CamSysRearPASE
ODX version: 006016
Faults:
No trouble codes found
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: 76 Parking Assistance
Active faults: 0
Inactive faults: 1
System description: PARKHILFE 8K
Software number: 5Q0919294K
Software version: 0054
Hardware number: 5Q0919294A
Hardware version: H03
Serial number: 39391601303741
ODX name: EV_EPHVA18AU3700000
ODX version: 002026
Faults:
U112300 - Databus error value received
Intermittent
Date: 2022-05-25 00:34:35
Mileage: 74304 km
Priority: 6
Malfunction frequency counter: 3
Unlearning counter: 230
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: BB Rear Left Door
Active faults: 0
Inactive faults: 1
System description: TSG HFS
Software number: 5Q0959395E
Software version: 0041
Hardware number: 5Q0959395B
Hardware version: 020
Serial number: 161215BLF01523
ODX name: EV_DCURearDriveMINKLO
ODX version: 006003
Faults:
- Unknown
Intermittent
Date: 2022-05-25 12:56:17
Mileage: 74305 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 229
Mileage: 74354 km
Date: 2022-05-27 17:05
---------------------------------------------------------------
Fault
Control unit: BC Rear Right Door
Active faults: 0
Inactive faults: 1
System description: TSG HBFS
Software number: 5Q0959395E
Software version: 0041
Hardware number: 5Q0959395B
Hardware version: 020
Serial number: 161215BLF01526
ODX name: EV_DCURearPasseMINKLO
ODX version: 006003
Faults:
- Unknown
Intermittent
Date: 2022-05-25 12:56:17
Mileage: 74305 km
Priority: 2
Malfunction frequency counter: 1
Unlearning counter: 229
Mileage: 74354 km
Date: 2022-05-27 17:05
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Post by dv52 (Australia) on Jun 2, 2022 21:51:58 GMT
ryan: Hi. Of course anything is possible and remote diagnostics that relies solely on information in a forum post is highly inaccurate - but if this was my car, I would concentrate on getting the basics fixed (i.e. voltage problem) before dealing with the suspected misfire matter.
But first- try clearing the errors and see what faults re-appear (there are a bunch of DTCs in your scan with low Fault Frequency numbers - meaning that the problem hasn't reappeared in subsequent ignition cycles).
If the new scan is the same - clearly from the multiple "low voltage" DTCs (see readings in the freeze-frame data, 8.2V & 9.7V on hex09 module) - something odd is happening. The obvious question is - how healthy is the battery? If the answer is that the battery is OK - then I would look at the power cables from the battery (especially earthing points). Maybe also check the Live Data options in the Hex19 module (which is the master module for the LIN based alternator) - there's a bunch of battery/power-supply test channels that might be helpful Don |
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Post by ryanphillips on Jun 4, 2022 15:32:55 GMT
Hi Don, I was hoping you would reply as you are very knowledgeable from what I can see.
I had even more revelations as I dig into this. The low voltage codes all happened during the engine replacement. I am assuming they just let the battery die down and this is not what caused me that issue. Low voltage codes have not come back.
My issue now is VCDS and OBD11 cannot communicate with the ECM by whatever pathway it takes to read the codes. But a generic scanner or the generic OBD button on VCDS program does allow me to read it the codes. In the case, a simple misfire. But this has happened to me on both engines at idle and happens at random frequencies, it runs great other wise. So that is why I suspect it is either the ECM is going bad or whatever module is used to communicate with it. I can read codes off every other module with the exception of the unknown codes that be popped up on my door modules as seen above, as well but I don't know how to "trick" those ones into a fault to verify like I can with the ECM and causing an intentional misfire.
I realize it's impossible to diagnose online but since I just spent about half the cars value in a replacement engine, I'm hoping to solve as much as I can before succumbing to a dealer diagnosis, which I'm aware is likely inevitable lol
Just wondering if perhaps you have heard or read about this in your experience and what the fix may have been. Ie: ECM, Gateway or whatever it may be.
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Post by dv52 (Australia) on Jun 4, 2022 22:21:46 GMT
ryan: Not sure I really understand the new state of your scan results but I assume that you have bulk-cleared the errors and the low voltage faults are now gone. Maybe post-up a fresh scan. Apropos of your fears about the "ECM or whatever module is used to communicate with it going bad", again anything is possible - but there doesn't appear to be compelling evidence of this conclusion in your scan above (the "unknown" DTC notwithstanding). For your information in this matter, when you plug-in a scan tool (OBD11, VCDS, or any scan tool) into the car's OBD port - you actually connect directly to the Gateway module which has multiple functions. One of these functions is diagnostics. You can think of the Gateway module as the central controller - in diagnostics mode, it sends a request to each of the other modules on the various CAN buses to report back their equipment details and to provide a full dump of their fault memory contents (if any). This is a sequential communications process (by module address number) which is why in some diagnostic cables (like VCDS) you can see the scan report building-up by module address number (starting with the hex01 module - ECM). So, the diagnostic scan process is simply a series of challenge-response commands by the Gateway module to ALL modules that are registered in the car's "installation list". Each module has a quite sophisticated self diagnostic facility - particularly the newer generation modules that use UDS protocols - like those in your car. I assume that your car has not been tuned and I also assume that in every other respect - the modules on the drive-train CAN bus (i.e. ECM, gearbox, etc) are totally OEM.
I'm not sure why "VCDS and OBD11 cannot communicate with the ECM" (I'm not sure that I understand what this means) - but you might try removing the tick from "aggressive mode" in the auto-scan screen, or try directly accessing the ECM from the "Select Control Module" screen in VCDS.
In respect of the mis-fire, if the count rate is low and if there are no engine performance issues - then I suggest that you simply maintain an active surveillance regime on these errors. As you no doubt know, chasing intermittent faults is a dubious and often futile exercise.
Don
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