Intake Air Temperature Sensor (G42) fault (2.0 tdi BKD)

[lincoln_dj]

Hi,

I have the below fault code showing on my '56 BKD (2.0 TDi) A3.

I've swapped the sensor (F00C2G2055) over from a known working car (I also put the 'faulty' sensor on the good car). The fault stayed with the car.

As per the VCDS wiki page I then checked all fuses, all are OK.

Last remaining thing to check is the wiring. Physically all looks OK, so just wondered if anyone knew what values I should see at the plug?

Voltage-wise there's +12V between pin D and battery negative (as per attached image), and +5V at pin B. Which seems sensible. Note there's no metal pin at point E.

Any ideas on what to check next please? Also, how do I interpret the 3 temperature readings shown in the log?

Thanks in advance!
Adam.


VCDS Log:
Address 01: Engine Labels: 03G-906-016-BKD.clb
Part No SW: 03G 906 021 LG HW: 03G 906 021 AN
Component: R4 2,0L EDC G000SG 9558
Revision: --H06--- Serial number: AUX7Z0FDFN40X8
Coding: 0000072
Shop #: WSC 06314 000 00000
VCID: 6FE641B17EEC5CF1A8-803A
VINID: 9D196AAAA2202074410891C20CADF97904

1 Fault Found:
000275 - Intake Air Temp. Sensor (G42)
P0113 - 000 - Signal too High
Freeze Frame:
Fault Status: 01100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 280552 km
Time Indication: 0
Date: 2021.09.17
Time: 03:39:12

Freeze Frame:
RPM: 798 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 14.29 V
Temperature: 133.2°C
Temperature: 9.5°C
Temperature: 9.9°C

Readiness: 1 1 0 0 1

VCDS Wiki info:

Possible Causes​

• Fuse(s) faulty
• Wiring and/or Connector(s) from/to Intake Air Temp. Sensor (G42) faulty
• Intake Air Temp. Sensor (G42) faulty

Possible Solutions​

• Check Fuse(s)
• Check Wiring and/or Connector(s) from/to Intake Air Temp. Sensor (G42)
• Check/Replace Intake Air Temp. Sensor (G42)

 

[NHN]

No corrosion on the pins internally is there?

 

[lincoln_dj]

No corrosion on the pins internally is there?

Thanks for the reply. it’s quite hard to see in fully, but looks in mint condition tbf

there isn’t more than one type of sensor (with the same plug) is there?

only difference between this and the good car is that this is BKD and the good car is BMN.

Part number on the sensor is F 00C 2G2 055

 

[lincoln_dj]

I’m now wondering if there is indeed a different sensor for the BKD? Unfortunately Audi / TPS only sell the MAF as a whole and not the sensor on its own so can’t check what the part number should be.

anyway, measured some more values, and between each pin and battery negative I get the following:


On BMN car:
Pin A: 87k ohms
Pin C: 11.4 ohms

On BKD car:
Pin A: 9.4K ohms
Pin C: 6 ohms

both, 5v at D and 12v at B

Maybe someone here is able to tell me what part number their actual sensor is on a BKD?

 

[ahtcap]

Is this what you are looking for?
https://www.ebay.co.uk/itm/Air-Flow...k__Ww8beX5xPaoFXGAr1g_LsSrWKJJ-hoChbkQAvD_BwE

 

[lincoln_dj]

Is this what you are looking for?
https://www.ebay.co.uk/itm/Air-Flow...k__Ww8beX5xPaoFXGAr1g_LsSrWKJJ-hoChbkQAvD_BwE

cheers mate, that is the sensor I have fitted already - albeit mine doesn't have a resistor fitted (and neither does the one on the BMN car). Maybe they're needed on a BKD...

Anyone know the value of the resistor?

 

[lincoln_dj]

For reference, in case anyone else re-visits this in the future - the sensor I've been testing (and found no issue with) is the MAF!

Still hoping to resolve the intake temperature fault

 

[lincoln_dj]

Anyone able to confirm if this is the G42 sensor please? (item 18)

 

[ahtcap]

Think that`s the boost sensor

 

[lincoln_dj]

Thanks. Really struggling to find an answer for this. Definitely cant see any other sensor.

Wondering if it uses another sensor (MAF etc) for the intake temperature.

 

[ahtcap]

http://www.brick-yard.co.uk/forum/po113-error-code-fix-038-906-051-c_topic94446.html
This might help

 

[Shane 33]

I fixed mine!
So I’ve been battling this fault and thought I’d share what it was. I changed turbo and MAP sensor and it was a broken wire. The yellow and brown wire that are twisted rubbed and broke on the T connector.



2.0tdi bkd engine Audi a3.