Misfires in every cylinders, no fault code

   #1  

macasoft

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VCDS Serial number
C?ID=441023
2016 Jetta S, 1.4 TSI, VCDS unlimited edition. I bought the car at 62500 miles, now have 73834 miles. It is running ok I would say. Per Ross-Tech manual, I ran an AutoScan and saved the contents of the ECUs yesterday. (Will show autoscans below). I saw some faults, cleared them, you will see below. Then I was monitoring misfires during a ~30 min ride (starting cold) as I felt a slightly rough idle (a misfire here and there). Ran another autoscan after that 30 min ride, and autoscan did not show any fault (not shown, identical as the 2nd part of the autoscan shown below).

The (total?) number of misfire counter for all cylinders is around 24000-27000. During the ride, the misfire per 1000 rpm for cylinders were 1-5 in all. I also monitored air mass flows and O2 Sensor B1-S2: Status-Bits 0-7. Air mass flow followed the specified value. Status bits started to change after ~5 min, I would say when the car warmed up.

So, in a summary: no fault, but I see a couple misfires. My other 2 Jettas with the 1.8L TSI engines does not have these misfires. Should I be concerned, what should I check? O2 sensor was not replaced on it yet by my best knowledge. The car got the 60k service, including spark plugs, per service record and VW dealer invoice (previous owner was a VW dealership employee, not sure if technician or not, but I got the copy of the works done). I dont suspect plugs, coils, inlet valves as the misfires are shown up on all cylinders, so must be air/fuel related, by my hones opinion.

I don't copy here the log of the 30 min trip due to its size (115 kB) and possible irrelevance.

I appreciate every suggestion, and if you need chemistry/programming/fitness advice, let me know :) I am a PhD chemist, coding for 30 years, hardware/software/interfaces, and a licensed fitness instructor. Started to work on our cars as economic reasons (4 kids, 3 Jettas, Elantra, Camry, Civic), and also of interest. I just figured out the AC leak on the Civic (evaporator) and replaced, so I would say I am a 3-4 out of 10 when it comes to cars, but want to improve. Thank you.

Here is the autoscan with the cleared faults:

Code:
Friday,14,May,2021,20:14:35:42034
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 21.3.0.0 (x64)  HEX-NET2 CB: 0.4543.4
Data version: 20210226 DS325.0
www.Ross-Tech.com


VIN: 3VW267AJ7GM290040   License Plate: 2016 JETTA S
Mileage: 118740km-73781mi   Repair Order: 2021-05-14



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: AJ-VW36 (7E0)
Scan: 01 02 03 04 08 09 15 17 19 25 44 5F

VIN: 3VW267AJ7GM290040   Mileage: 118740km-73781miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CZTA)       Labels:. 04E-907-309-V1.clb
   Part No SW: 04E 906 023 AQ    HW: 04E 907 309 AP
   Component: R4 1.4l TFS   H22 2954 
   Revision: X5H22---   
   Coding: 011A0012232400000000
   Shop #: WSC 53714 001 1048576
   ASAM Dataset: EV_ECM14TFS01104E906023AQ 003003
   ROD: EV_ECM14TFS01104E906023AQ.rod
   VCID: 6FB0B9DAB7174F53669-803A

   Center armrest control head 1:

5 Faults Found:
8221 - System Voltage
          P0562 00 [032] - Too Low
          Intermittent - Not Confirmed - Tested Since Memory Clear

4482 - Function Restriction due to Implausible Message(s)
          U1112 00 [032] - -
          Intermittent - Not Confirmed - Tested Since Memory Clear

2780 - Engine Temperature too Low
          P3081 00 [096] - -
          Intermittent - Not Confirmed - Tested Since Memory Clear

4166 - Manifold Pressure / Boost Sensor (G31)
          P0238 00 [032] - Signal too High
          Intermittent - Not Confirmed - Tested Since Memory Clear

20572 - Intake Air Temp. Sensor (G42)
          P0113 00 [032] - Signal too High
          Intermittent - Not Confirmed - Tested Since Memory Clear

Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels: 09G-927-749-V2.clb
   Part No SW: 09G 927 749 AA    HW: 09G 927 749 AA
   Component: AISIN AG6 G3  129 2944 
   Coding: 010200000C000000000000000000000000000000
   Shop #: WSC 00066 790 00013
   ASAM Dataset: EV_TCMAQ250031 002009
   ROD: EV_TCMAQ250031_002_VW23.rod
   VCID: 78A28286C25908EBB73-802C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 CC    HW: 1K0 907 379 CC
   Component: ESP MK60EC1   H46 0175 
   Revision: 00H46001   
   Coding: A14B400C492B00FA850B02E89219004121100012
   Shop #: WSC 00066 000 00000
   VCID: 75BC8BB2D5CB7583AC5-8020

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 5C0-820-047.clb
   Part No SW: 5C0 820 047 CK    HW: 5C0 820 047 CK
   Component: J301  Klimaanlage   0210 
   Revision: 2001402S    Serial number: 00000003000014
   Shop #: WSC 00066 790 00013
   VCID: 6B88ADCA8F8FB3734A1-803E

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 7E0-937-BCM-V1.clb
   Part No SW: 7E0 937 189     HW: 7E0 937 189
   Component: BCM PQ25 MMI3 H80 0733 
   Revision: BA080001    Serial number: 18003320150052
   Coding: 7B994B1808AB0B0000392080240884D50FC6702E60004070B00010032844
   Shop #: WSC 00066 000 00000
   VCID: 71B4BFA2A1A359A370D-8024

   Subsystem 1 - Part No SW: 6R0 959 801 AN    HW: 6R0 959 801 AN  Labels: 6R0-959-801.CLB
   Component: J386__TSG_FT  006 5461
   Serial number: 14102585151015074649
   Coding: 820000

   Subsystem 2 - Part No SW: 6R0 959 802 AS    HW: 6R0 959 802 AS  Labels: 6R0-959-802.CLB
   Component: J387__TSG_BT  006 5461
   Serial number: 14102584151026222925
   Coding: 820000

   Subsystem 3 - Part No SW: 6C0 959 442 A    HW: 6C0 959 442 A
   Component: E221__MFL-TAT  H04 0019
   Serial number: 2541516213300859AD1B
   Coding: 280000

   Subsystem 4 - Part No SW: 6R0 959 811 M    HW: 6R0 959 811 M
   Component: J388__TSG_HL  006 5460
   Serial number: 14102587150930193925
   Coding: 800000

   Subsystem 5 - Part No SW: 6R0 959 812 M    HW: 6R0 959 812 M
   Component: J389__TSG_HR  006 5460
   Serial number: 14202586151030084139
   Coding: 800000

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 561-959-655.clb
   Part No SW: 561 959 655     HW: 561 959 655
   Component: AirbagVW11    001 0207 
   Serial number: 003RXM029W10
   Coding: 8CCCF000000000005000001AC20800000065
   Shop #: WSC 00066 790 00013
   ASAM Dataset: EV_AirbaVW11SMEVW411 001002
   ROD: EV_AirbaVW11SMEVW411.rod
   VCID: 6398C5EA6BDFFB33F21-8036

   Seat occupied recognition:
   Subsystem 1 - Part No SW: 4M0 959 339 B    HW: 4M0 959 339 B
   Component: BF-Gewichtss.  H11 0021
   Serial number: IBH000000000003X3SSC
   Coding: 303141

   Crash sensor for side airbag: driver side:
   Subsystem 2 - Part No SW: -----------    HW: 480 002 509 15
   Component: SideSensor_Df  001 0887
   Serial number: 35700000000778CCE61$

   Front Passenger's Side Airbag Crash Sensor:
   Subsystem 3 - Part No SW: -----------    HW: 480 002 509 15
   Component: SideSensor_Pf  001 0887
   Serial number: 35800000000227CCE61T

   Rear Side Airbag Crash Sensor (on driver's side):
   Subsystem 4 - Part No SW: -----------    HW: 480 023 009 15
   Component: SideSensor_Dr  000 0148
   Serial number: 3510001AD1BF4CA1F32L

   Passenger side rear thorax airbag crash sensor:
   Subsystem 5 - Part No SW: -----------    HW: 480 023 009 15
   Component: SideSensor_Pr  000 0148
   Serial number: 3520001AD1BF4CA2C69U

   Crash sensor for front airbag: driver side:
   Subsystem 6 - Part No SW: -----------    HW: 480 021 709 15
   Component: FrontSensor_D  000 0189
   Serial number: 3550001A11BB2F13B2A6

   Crash sensor for front airbag: front passenger side:
   Subsystem 7 - Part No SW: -----------    HW: 480 021 709 15
   Component: FrontSensor_P  000 0189
   Serial number: 3560001B11BE6063223W

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
   Part No SW: 5C6 920 955 A    HW: 5C6 920 955 A
   Component: KOMBI         H04 1007 
   Serial number: 00000000000000
   Coding: 270A010000
   Shop #: WSC 00066 790 00319
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A05730
   ROD: EV_Kombi_UDS_VDD_RM09_005_VW25.rod
   VCID: 2D0C63D27D9B7D43145-8078

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 7E0-909-901.clb
   Part No SW: 7E0 909 901     HW: 7E0 937 189
   Component: GW-K-CAN TP20 H80 0733 
   Revision: BA080001   
   Coding: 102201
   Shop #: WSC 00066 000 00000
   VCID: 6882D2C69279986B273-803C

1 Fault Found:
01044 - Control Module Incorrectly Coded
            000 - - - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 2
                    Fault Frequency: 10
                    Reset counter: 255
                    Mileage: 17501 km
                    Time Indication: 0
                    Date: 2018.05.11
                    Time: 00:31:20


-------------------------------------------------------------------------------
Address 25: Immobilizer (J334)       Labels:| 5K0-920-xxx-25.clb
   Part No SW: 5K0 953 234     HW: 5K0 953 234
   Component: IMMO          H04 1007 
   Serial number:              
   Coding: 000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03710
   ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
   VCID: 6A86A8CE8CF5AA7B317-803E

1 Fault Found:
9456681 - Key
          B104C 29 [008] - Implausible Signal
          Intermittent - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 2
                    Mileage: 104768 km
                    Date: 2020.09.23
                    Time: 04:19:22


-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 R
   Component: EPS_ZFLS Kl. 305    3501 
   Revision: 00H22000   
   Shop #: WSC 02069 000 90108
   VCID: 39244782B553D1E388D-806C

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:| 5G0-035-MIB-STD2.clb
   Part No SW: 5C0 035 200     HW: 5C0 035 200
   Component: MU-S-S-US     H22 0245 
   Serial number: VWZAZ2R0530097
   Coding: 02630100AA00000011220001001808001F0100D40020010002
   Shop #: WSC 00066 790 00013
   ASAM Dataset: EV_MUStd4CTSAT 001022
   ROD: EV_MUStd4CTSAT_VW32.rod
   VCID: 52F6102E046502BB697-8006

No fault code found.

End----------(Elapsed Time: 01:06, VBatt start/end: 12.3V/12.3V)-----------

Code:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 01: DTCs cleared
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


                Address 19: CAN Gateway       Labels: 7E0-909-901.clb
Control Module Part Number: 7E0 909 901     HW: 7E0 937 189
  Component and/or Version: GW-K-CAN TP20 H80 0733
           Software Coding: 102201
            Work Shop Code: WSC 00066 000 00000
                      VCID: 6882D2C69279986B273-803C
1 Fault Found:

01044 - Control Module Incorrectly Coded
            000 - - - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 2
                    Fault Frequency: 10
                    Reset counter: 255
                    Mileage: 17501 km
                    Time Indication: 0
                    Date: 2018.05.11
                    Time: 00:31:20


--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 19: DTCs cleared
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 25: DTCs cleared
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Code:
Chassis Type: AJ-VW36 (7E0)
Scan: 01 02 03 04 08 09 15 17 19 25 44 5F

VIN: 3VW267AJ7GM290040   Mileage: 118740km-73781miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CZTA)       Labels:. 04E-907-309-V1.clb
   Part No SW: 04E 906 023 AQ    HW: 04E 907 309 AP
   Component: R4 1.4l TFS   H22 2954 
   Revision: X5H22---   
   Coding: 011A0012232400000000
   Shop #: WSC 53714 001 1048576
   ASAM Dataset: EV_ECM14TFS01104E906023AQ 003003
   ROD: EV_ECM14TFS01104E906023AQ.rod
   VCID: 6FB0B9DAB7174F53669-803A

   Center armrest control head 1:

No fault code found.
Readiness: 1110 0101

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels: 09G-927-749-V2.clb
   Part No SW: 09G 927 749 AA    HW: 09G 927 749 AA
   Component: AISIN AG6 G3  129 2944 
   Coding: 010200000C000000000000000000000000000000
   Shop #: WSC 00066 790 00013
   ASAM Dataset: EV_TCMAQ250031 002009
   ROD: EV_TCMAQ250031_002_VW23.rod
   VCID: 78A28286C25908EBB73-802C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 CC    HW: 1K0 907 379 CC
   Component: ESP MK60EC1   H46 0175 
   Revision: 00H46001   
   Coding: A14B400C492B00FA850B02E89219004121100012
   Shop #: WSC 00066 000 00000
   VCID: 75BC8BB2D5CB7583AC5-8020

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 5C0-820-047.clb
   Part No SW: 5C0 820 047 CK    HW: 5C0 820 047 CK
   Component: J301  Klimaanlage   0210 
   Revision: 2001402S    Serial number: 00000003000014
   Shop #: WSC 00066 790 00013
   VCID: 6B88ADCA8F8FB3734A1-803E

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 7E0-937-BCM-V1.clb
   Part No SW: 7E0 937 189     HW: 7E0 937 189
   Component: BCM PQ25 MMI3 H80 0733 
   Revision: BA080001    Serial number: 18003320150052
   Coding: 7B994B1808AB0B0000392080240884D50FC6702E60004070B00010032844
   Shop #: WSC 00066 000 00000
   VCID: 71B4BFA2A1A359A370D-8024

   Subsystem 1 - Part No SW: 6R0 959 801 AN    HW: 6R0 959 801 AN  Labels: 6R0-959-801.CLB
   Component: J386__TSG_FT  006 5461
   Serial number: 14102585151015074649
   Coding: 820000

   Subsystem 2 - Part No SW: 6R0 959 802 AS    HW: 6R0 959 802 AS  Labels: 6R0-959-802.CLB
   Component: J387__TSG_BT  006 5461
   Serial number: 14102584151026222925
   Coding: 820000

   Subsystem 3 - Part No SW: 6C0 959 442 A    HW: 6C0 959 442 A
   Component: E221__MFL-TAT  H04 0019
   Serial number: 2541516213300859AD1B
   Coding: 280000

   Subsystem 4 - Part No SW: 6R0 959 811 M    HW: 6R0 959 811 M
   Component: J388__TSG_HL  006 5460
   Serial number: 14102587150930193925
   Coding: 800000

   Subsystem 5 - Part No SW: 6R0 959 812 M    HW: 6R0 959 812 M
   Component: J389__TSG_HR  006 5460
   Serial number: 14202586151030084139
   Coding: 800000

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 561-959-655.clb
   Part No SW: 561 959 655     HW: 561 959 655
   Component: AirbagVW11    001 0207 
   Serial number: 003RXM029W10
   Coding: 8CCCF000000000005000001AC20800000065
   Shop #: WSC 00066 790 00013
   ASAM Dataset: EV_AirbaVW11SMEVW411 001002
   ROD: EV_AirbaVW11SMEVW411.rod
   VCID: 6398C5EA6BDFFB33F21-8036

   Seat occupied recognition:
   Subsystem 1 - Part No SW: 4M0 959 339 B    HW: 4M0 959 339 B
   Component: BF-Gewichtss.  H11 0021
   Serial number: IBH000000000003X3SSC
   Coding: 303141

   Crash sensor for side airbag: driver side:
   Subsystem 2 - Part No SW: -----------    HW: 480 002 509 15
   Component: SideSensor_Df  001 0887
   Serial number: 35700000000778CCE61$

   Front Passenger's Side Airbag Crash Sensor:
   Subsystem 3 - Part No SW: -----------    HW: 480 002 509 15
   Component: SideSensor_Pf  001 0887
   Serial number: 35800000000227CCE61T

   Rear Side Airbag Crash Sensor (on driver's side):
   Subsystem 4 - Part No SW: -----------    HW: 480 023 009 15
   Component: SideSensor_Dr  000 0148
   Serial number: 3510001AD1BF4CA1F32L

   Passenger side rear thorax airbag crash sensor:
   Subsystem 5 - Part No SW: -----------    HW: 480 023 009 15
   Component: SideSensor_Pr  000 0148
   Serial number: 3520001AD1BF4CA2C69U

   Crash sensor for front airbag: driver side:
   Subsystem 6 - Part No SW: -----------    HW: 480 021 709 15
   Component: FrontSensor_D  000 0189
   Serial number: 3550001A11BB2F13B2A6

   Crash sensor for front airbag: front passenger side:
   Subsystem 7 - Part No SW: -----------    HW: 480 021 709 15
   Component: FrontSensor_P  000 0189
   Serial number: 3560001B11BE6063223W

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
   Part No SW: 5C6 920 955 A    HW: 5C6 920 955 A
   Component: KOMBI         H04 1007 
   Serial number: 00000000000000
   Coding: 270A010000
   Shop #: WSC 00066 790 00319
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A05730
   ROD: EV_Kombi_UDS_VDD_RM09_005_VW25.rod
   VCID: 2D0C63D27D9B7D43145-8078

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 7E0-909-901.clb
   Part No SW: 7E0 909 901     HW: 7E0 937 189
   Component: GW-K-CAN TP20 H80 0733 
   Revision: BA080001   
   Coding: 102201
   Shop #: WSC 00066 000 00000
   VCID: 6882D2C69279986B273-803C

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer (J334)       Labels:| 5K0-920-xxx-25.clb
   Part No SW: 5K0 953 234     HW: 5K0 953 234
   Component: IMMO          H04 1007 
   Serial number:              
   Coding: 000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03710
   ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
   VCID: 6A86A8CE8CF5AA7B317-803E

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 R
   Component: EPS_ZFLS Kl. 305    3501 
   Revision: 00H22000   
   Shop #: WSC 02069 000 90108
   VCID: 39244782B553D1E388D-806C

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:| 5G0-035-MIB-STD2.clb
   Part No SW: 5C0 035 200     HW: 5C0 035 200
   Component: MU-S-S-US     H22 0245 
   Serial number: VWZAZ2R0530097
   Coding: 02630100AA00000011220001001808001F0100D40020010002
   Shop #: WSC 00066 790 00013
   ASAM Dataset: EV_MUStd4CTSAT 001022
   ROD: EV_MUStd4CTSAT_VW32.rod
   VCID: 52F6102E046502BB697-8006

No fault code found.

End----------(Elapsed Time: 01:06, VBatt start/end: 14.2V/14.1V)-----------
 
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   #2  

Uwe

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What do your fuel trims look like?

-Uwe-
 
   #3  

macasoft

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Sorry, took me a while to check as I dont have Measuring blocks in engine. Both long and short term adaptation of mixture formation is 0% (short is between -2 and 5%, but short term is also sitting around 0% at most of the time, sample rate 1.6)
 
   #4  

macasoft

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More work done: I cleared the codes and then monitored.
Short 7%, long is 0%
After 60 sec
Short jumping around 0%, long is 4.7%


Seems I might have an intake leak?
 
   #5  

Uwe

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4.7% isn't horrible...

How much has it been driven since the last time fault codes were cleared?

-Uwe-
 
   #6  

macasoft

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It was on idle for like 5 min, not driven. Then I cleared and monitored the fuel trims. Sorry if I misled you. Still learning, it should have been warm, right? Tomorrow evening when my daughter is home from work, and car is warmed up, I clear and drive for 10 min and collect this data. Thank you for your patience.
 
   #7  

macasoft

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So I drove the car for ~10 min, after it was driven for 30 min (warm) AND DTCs were cleared. The STFT and LTFT both stayed below 1% and +/-5%, so in the normal range, did not feel rough. I saw a couple misfires, here and there, 5 max from a cylinder during 10 min. Even when it was left on idle for a while after the 10 min, FTs were in that range I wrote. Seems that clearing DTCs a couple times fixed it/helped the ECU to correct whatever settings it had (?).
 
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   #8  

Bruce

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--------
Seems that clearing DTCs a couple times fixed it/helped the ECU to correct whatever settings it had (?).
We hope that would be the case. However, experience says, that is not likely. Keep driving and keep monitoring...

Perhaps in the investigation something was moved and has been restored for now?

Gremlins! That what it is! Poking around, you scared them into leaving you be for a bit. They will be back. :(;)
 
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macasoft

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I did not move anything... I did the previous test on cold engine...

But you are right, I will monitor. I wanted to do a propane test for leaks, but decided not to, as low FTs. On a second thought, it should not matter, I could still do the test and see if any leaks. Will do on the weekend. Wife said I look for car issues to fix :) (other daughter has a Civic and threw a lean code, seems a timely air filter change and MAS clean took care of that; and AC went bad, needs evap core replacement.)

Thanks again for continued patience and support!
 
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