Juhis
New Member
Hello,
This is my first post in this forum, so ask for some understanding.
Happened so far:
Engine caution light (MIL) came ON. Checked trouble codes, P0420 found. Reset the code, after that no faults. After running 1 or 2 days, light comes back with the same code. Catalysator, exhaust has been checked visually for leaks, no findings. Before having VCDS, sensor data read with Torque (free Android app) and Bluetooth adapter. O2 sensor B1S1 no graph (no errors or faults either). B1S2 reading fluctuating between 0,1-0,9V. Pre-catalysator O2 sensor (B1S1) replaced. B1S2 reading smoother, still no reading for B1S1. Engine running has been OK all the time. Measured exhaust pipe surface temperatures before and aft catalysator. Before ~240C, after >270C.Suppose that catalysator is working if not perfectly, but at least should be ok.
I would like to get good advice what to do next. I do not want buy catalysator to test if that would work of replace aft lambda (B1S2) before idea. Also thought if this could be wiring problem between sensor-ECU or ECU-OBD because of missing B1S1 reading. Having no wiring diagram cannot see if MIL is controlled directly by ECU or some other controller? Are there any VCDS tests, adaptation or coding to dig in further details? How to confirm that both lambdas are OK?
And tips or troubleshooting procedure would be appreciated.
Autoscan printout:
This is my first post in this forum, so ask for some understanding.
Happened so far:
Engine caution light (MIL) came ON. Checked trouble codes, P0420 found. Reset the code, after that no faults. After running 1 or 2 days, light comes back with the same code. Catalysator, exhaust has been checked visually for leaks, no findings. Before having VCDS, sensor data read with Torque (free Android app) and Bluetooth adapter. O2 sensor B1S1 no graph (no errors or faults either). B1S2 reading fluctuating between 0,1-0,9V. Pre-catalysator O2 sensor (B1S1) replaced. B1S2 reading smoother, still no reading for B1S1. Engine running has been OK all the time. Measured exhaust pipe surface temperatures before and aft catalysator. Before ~240C, after >270C.Suppose that catalysator is working if not perfectly, but at least should be ok.
I would like to get good advice what to do next. I do not want buy catalysator to test if that would work of replace aft lambda (B1S2) before idea. Also thought if this could be wiring problem between sensor-ECU or ECU-OBD because of missing B1S1 reading. Having no wiring diagram cannot see if MIL is controlled directly by ECU or some other controller? Are there any VCDS tests, adaptation or coding to dig in further details? How to confirm that both lambdas are OK?
And tips or troubleshooting procedure would be appreciated.
Autoscan printout:
Code:
Friday,29,August,2014,16:50:09:32867
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 12.12.2.0 (x64)
Data version: 20140212
VIN: License Plate: TYM-431
Mileage: 296170km-184031mi Repair Order:
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Chassis Type: 1J - VW Golf/Bora IV (1998 > 2006)
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76
Mileage: 296170km/184031miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 036-906-032-AXP.lbl
Part No: 036 998 032 P
Component: ME7.5.10 5046
Coding: 00031
Shop #: WSC 22000
VCID: 285400CAC873785EF37-5178
1 Fault Found:
16804 - Catalyst System; Bank 1
P0420 - 35-00 - Efficiency Below Threshold
Readiness: 0000 0000
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1C0-907-37x-ABS.lbl
Part No: 1C0 907 379 C
Component: ABS FRONT MK60 0103
Coding: 0001025
Shop #: WSC 00046 615 1234567
VCID: 2A50FAC2867F4A4EE53-5178
No fault code found.
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 6Q0 909 605 A
Component: 27 AIRBAG VW5 01 0006
Coding: 12855
Shop #: WSC 00046
VCID: 356AD9BE0FC115B6781-4B32
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1J0-920-xx5-17.lbl
Part No: 1J0 920 805
Component: KOMBI+WEGFAHRS. BOO V04
Coding: 05111
Shop #: WSC 00046
VCID: E3CED7E671D55B06665-515A
Subsystem 1 - Part No: Ident
Component: Nr. WEGFAHRS.:VWZ6Z0A3031525
Ident.-Nr. WEGFAHRS.:VWZ6Z0A3031525
No fault code found.
-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 00046
VCID: F0E4A8AAB023F09EEB7-5178
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1J0-959-799.lbl
Part No: 1J0 959 799 Q
Component: 4C Zentral-SG Komf. 0001
Coding: 04097
Shop #: WSC 00046
VCID: 4C9C9C5A7C4B747E37F-4B18
Subsystem 1 - Part No: 1J1959801C
Component: 4C Tõrsteuerger. FS0002r
Subsystem 2 - Part No: 1J1959802D
Component: 4C Tõrsteuerger. BF0002r
Subsystem 3 - Part No: 1J4959811C
Component: 4C Tõrsteuerger. HL0002r
Subsystem 4 - Part No: 1J4959812C
Component: 4C Tõrsteuerger. HR0002r
2 Faults Found:
00944 - Heated Exterior Mirror; Passenger Side (Z5)
35-00 - -
00935 - Electric Window Motor; Rear Right (V27)
62-10 - No or Incorrect Adjustment - Intermittent
End ---------------------------------------------------------------------
Code:
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Address 46: DTCs cleared
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Address 01: DTCs cleared
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Address 01:036 998 032 P channel 0 adapted from --- to 000
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