got a fault code. Any thoughts?

B6/7 S4/RS4
#1

Wednesday,05,January,2011,19:35:06:10074
VCDS Version: Release 10.6.4

            Address 11: Engine II       Labels: 079-910-560-BNS2.lbl

Control Module Part Number: 8E1 910 560 J HW: 8E1 907 560
Component and/or Version: 4.2L V8/4V FSI ª0010
Software Coding: 01040009180F0160
Work Shop Code: WSC 93204 999 85775
VCID: 2D550D87CD81
1 Fault Found:

004897 - Knock Sensor 3 (G198): Signal too Small
P1321 - 002 - Lower Limit Exceeded - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10100010
Fault Priority: 0
Fault Frequency: 2
Mileage: 71950 km
Time Indication: 0

         Freeze Frame:
                RPM: 2867 /min
                Load: 27.0 %
                Speed: 75.0 km/h
                Temperature: 93.0°C
                Temperature: 11.0°C
                Absolute Pres.: 990.0 mbar
                Voltage: 13.335 V
#2

Not much info on the code on the google, but it is the knock sensor for cylinders 7 & 8. It’s not knock in the cylinder. From what I gather about that code, it’s either an issue with the ECU, the wiring, or the sensor itself. It’s most likely the sensor itself. “lower limit exceeded” is the code I got when one of my o2 sensors went bad.

Clear it and see if it comes back. Do a visual inspection of the wires, although I doubt you will be able to see anything. Those sensors are the ones in the valley, under the IM. Which also means that you might as well do a carbon cleaning and replace zee sensor

#3

I cleared it. I will now pray for it to come back as that Labour would be half the carbon Labour. If it needs replacing I will finagle a half price carbon clean out of the deal thanks to my warranty paying the sensor Labour.

Thanks for the info. Code cleared and mot back yet.

#4

I think it will take a few key cycles to make the code come back.

#5

I had a very similar knock sensor fault code last year. Cleared it a few times, kept coming back. Replaced the sensor and it fixed the problem.

#6

Was it a big job to replace the sensor as Joe described? Not that we have the same car but just wondering.

#7

Yes. You have to pull the intake manifold.

The code happened while you were crusing around 45mph so just keep driving normally to see if it comes back. That code means the ECM is not seeing a signal from the knock sensor when it is trying to run lean to save gas. They tend to throw a lot of ignition timing at it until it knocks then back off.

#8

got a couple more…

Friday,28,January,2011,13:08:55:10074
VCDS Version: Release 10.6.4

            Address 01: Engine       Labels: 079-910-560-BNS1.lbl

Control Module Part Number: 8E1 910 560 J HW: 8E1 907 560
Component and/or Version: 4.2L V8/4V FSI ª0010
Software Coding: 01040009180F0160
Work Shop Code: WSC 93204 999 85775
VCID: 2D550D87CD81
1 Fault Found:

006435 - Please Check DTC Memory of ECU Number 2
P1923 - 008 - Implausible Signal
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Mileage: 73961 km
Time Indication: 0

         Freeze Frame:
                RPM: 182 /min
                Load: 100.0 %
                Speed: 0.0 km/h
                Temperature: 10.0°C
                Temperature: 12.0°C
                Absolute Pres.: 990.0 mbar
                Voltage: 10.287 V

Readiness: 0000 0000

======================================

and then

======================================

Friday,28,January,2011,13:10:40:10074
VCDS Version: Release 10.6.4

            Address 11: Engine II       Labels: 079-910-560-BNS2.lbl

Control Module Part Number: 8E1 910 560 J HW: 8E1 907 560
Component and/or Version: 4.2L V8/4V FSI ª0010
Software Coding: 01040009180F0160
Work Shop Code: WSC 93204 999 85775
VCID: 2D550D87CD81
1 Fault Found:

000372 - Fuel Trim; Bank 2: System Too Lean
P0174 - 004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 0
Fault Frequency: 1
Mileage: 73726 km
Time Indication: 0

         Freeze Frame:
                RPM: 1330 /min
                Load: 27.4 %
                Speed: 51.0 km/h
                Temperature: 68.0°C
                Temperature: 13.0°C
                Absolute Pres.: 1000.0 mbar
                Voltage: 13.843 V
#9

Time to cash in on that CPO?

#10

I don’t have a cel of any sort… But I’m just waiting for something that will trigger a carbon clean.

#11

got another one (that other one never came back after clearing)

when my car triggers a CEL (twice now) I start rubbing rabbits feet and four leaf clovers hoping it’s a manifold flap code necessitating a carbon clean lol

Anyway…

Saturday,01,January,2011,22:52:05:10074
VCDS Version: Release 10.6.4

            Address 01: Engine       Labels: 079-910-560-BNS1.lbl

Control Module Part Number: 8E1 910 560 J HW: 8E1 907 560
Component and/or Version: 4.2L V8/4V FSI ª0010
Software Coding: 01040009180F0160
Work Shop Code: WSC 93204 999 85775
VCID: 2D550D87CD81
1 Fault Found:

006435 - Please Check DTC Memory of ECU Number 2
P1923 - 008 - Implausible Signal
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 1
Mileage: 79586 km
Time Indication: 0

         Freeze Frame:
                RPM: 0 /min
                Load: 0.0 %
                Speed: 0.0 km/h
                Temperature: 96.0°C
                Temperature: 43.0°C
                Absolute Pres.: 990.0 mbar
                Voltage: 12.192 V

Readiness: 0000 0000

then I flipped over to ECU2

Saturday,01,January,2011,22:55:02:10074
VCDS Version: Release 10.6.4

            Address 11: Engine II       Labels: 079-910-560-BNS2.lbl

Control Module Part Number: 8E1 910 560 J HW: 8E1 907 560
Component and/or Version: 4.2L V8/4V FSI ª0010
Software Coding: 01040009180F0160
Work Shop Code: WSC 93204 999 85775
VCID: 2D550D87CD81
1 Fault Found:

004897 - Knock Sensor 3 (G198): Signal too Small
P1321 - 002 - Lower Limit Exceeded - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10100010
Fault Priority: 0
Fault Frequency: 2
Mileage: 79491 km
Time Indication: 0

         Freeze Frame:
                RPM: 2138 /min
                Load: 17.6 %
                Speed: 28.0 km/h
                Temperature: 96.0°C
                Temperature: 30.0°C
                Absolute Pres.: 980.0 mbar
                Voltage: 13.462 V