Help please IAT issue cayc engine

[F1brett1]

I know this has been covered millions of times but I can't find a fix so here goes.

I have a mk6 1.6tdi and the EML has come on I have scan it and been on google looking for help I’ve checked the wiring and all seems ok I’ve even ran a new earth just in case but I still get the same fault. I’ve included the scan report if anyone can help pls do so as I’m pulling my hair out well what I have left 😂. I've not change the sensor due to everything I've read points to wiring. Address 01: Engine Labels: 03L-906-023-CAY.clb
Control Module Part Number: 03L 997 557 M HW: 03L 906 023 A
Component and/or Version: R4 1.6l TDI H23 9983
Software Coding: 00114014032500080000
Work Shop Code: WSC 00066 000 00198
ASAM Dataset: EV_ECM16TDI02103L997557M 003003 (VW36)
ROD: EV_ECM16TDI02103L997557M.rod
VCID: 468388ABF97A4F7FE3-8012
1 Fault Found: 7308 - Intake Air Temp. Sensor (G42)
P0113 00 [037] - Signal too High
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 175955 km
Date: 2112.14.09
Time: 20:19:53
Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 66 °C
Intake air temperature: -40 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 12.649 V
Unlearning counter according OBD: 40
Engine speed: 0 /min
Vehicle speed: 0 km/h
Outside air temperature-Ambient temperature:

Thanks very much

[Crasher]

The value is -40 which indicates a dead sensor as an earth wiring fault would normally give an open/short circuit to earth. Last week I had one which was driving me mad, a petrol TT BAM engine. It came in with the MIL on and showed the post cat Lambda sensor was open circuit to earth. Inspecting the sensor showed the boss had been bodge welded and the sensor fitted with exhaust paste so we removed the cat and I rebuild the boss area with stainless plate, MIG and new boss and back together with a new Bosch sensor...... same fault, would not even delete for a moment. Plugged in a new genuine sensor, same fault... accessed the ECU and the plug was water damaged right on those pins, cleaned, checked from plug to plug, perfect, same code... We jumped an earth to the wire after the plug, still the same, decided to fit a new ECU, two days later I went to fit it and the code had gone and did not come back.......

[F1brett1]

Thanks Crasher so a dead sensor then I'll get one from work tomorrow then I take it, it's the one on the boost pipe which is a pain to get to lol with the screws being rusty.

[Keithuk]

VAG Error Code: 1649/205727/23096/16497/5282/4187/7308/000275

EOBD II Error Code: P0113


Fault Location:
Intake Air Temperature Sensor 1 (G42) - Signal too High

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.

Fuse(s).
Wiring/Connector(s) from/to Intake Air Temperature Sensor (G42) faulty.Intake Air Temperature Sensor 1 (G42).

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Intake Air Temperature Sensor (G42) < -46°C.
Check/Replace Intake Air Temperature Sensor (G42).

When is the code detected?:
An excessively high voltage from the sensor is sent to Engine Control Module (ECM).

Description:
The Intake Air Temperature Sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM). The
temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for
various systems in the vehicle.


As taken from my new EOBD II Error Codes

[F1brett1]

So I changed the intake sensor on the inter cooler pipe the light went out and the light has come back on here is the first scan report from today


Sunday,01,September,2019,10:45:38:56738
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 19.6.1.0 (x64)
Data version: 20190529 DS308.0
Ross-Tech: Home


VIN: WVWZZZ1KZAM625024 License Plate: BD52BSD
Mileage: 10955 Repair Order: 1/9/19



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


Address 01: Engine Labels: 03L-906-023-CAY.clb
Control Module Part Number: 03L 997 557 M HW: 03L 906 023 A
Component and/or Version: R4 1.6l TDI H23 9983
Software Coding: 00114014032500080000
Work Shop Code: WSC 00066 000 00198
ASAM Dataset: EV_ECM16TDI02103L997557M 003003 (VW36)
ROD: EV_ECM16TDI02103L997557M.rod
VCID: 468388ABF97A4F7FE3-8012
4 Faults Found:

7380 - Manifold Pressure / Boost Sensor (G31)
P0236 00 [032] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 175955 km
Date: 2112.14.09
Time: 20:30:23

Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 60 °C
Intake air temperature: -40 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 12.536 V
Unlearning counter according OBD: 27
Charge air pressure: actual value-MAP_MMV: 200.00 hPa
Charge air pressure specified value-MAP_SP_MMV: 200.00 hPa
Ambient air pressure: 101 kPa abs
Particle filter: difference pressure-DIP_PF: 0.00 hPa

7295 - Manifold Pressure / Boost Sensor (G31)
P0238 00 [032] - Signal too High
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 175955 km
Date: 2112.14.09
Time: 20:30:17

Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 60 °C
Intake air temperature: -40 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 12.536 V
Unlearning counter according OBD: 27
Engine speed: 0 /min
Vehicle speed: 0 km/h
Accelerator position: normalized-Accelerator position: 0.00 %
Charge air pressure specified value-MAP_SP_MMV: 200.00 hPa
Charge air pressure: actual value-MAP_MMV: 200.00 hPa
Charge Pressure Actuator: activation-ANG_SP_BPA[0]: 20.000 %
Charge Pressure Actuator: acknowledgment-ANG_BPA[0]: 8.716 %

7308 - Intake Air Temp. Sensor (G42)
P0113 00 [172] - Signal too High
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 254
Mileage: 175955 km
Date: 2112.14.10
Time: 16:56:52

Engine speed: 1606.75 /min
Normed load value: 78.0 %
Vehicle speed: 27 km/h
Coolant temperature: 34 °C
Intake air temperature: -40 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.005 V
Unlearning counter according OBD: 40
Engine speed: 942 /min
Vehicle speed: 1 km/h
Outside air temperature-Ambient temperature: 13.50 °C
Battery voltage: 13.8 V
Battery voltage: 13.8 V
Battery voltage: 13.8 V
Battery voltage: 13.8 V

10119 - High Pressure Fuel Rail
P00C6 00 [096] - Minimum Pressure Not Reached
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 2
Mileage: 176093 km
Date: 2112.14.15
Time: 16:33:53

Engine speed: 338.25 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 59 °C
Intake air temperature: 25 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 12.085 V
Unlearning counter according OBD: 35
Fuel high pressure: actual value-FUP_FIL: 1.678 MPa
Fuel pressure regulator valve: specified value rail pressure-LV_PCV_CTL: 00000001
Fuel level-FTL_CAN: 21 l
Time since engine start: 0 s
Fuel Metering Valve-VCV: 24.454 %
Fuel Pressure Regulator Valve-PCV: 42.558 %
Fuel high pressure commanded value_1-FUP_SP_KPA_ENVD: 25683.594 kPa


Readiness: 1 1 0 0 0

Then I cleared the code and took the car for a drive and this came back

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


Address 01: Engine Labels: 03L-906-023-CAY.clb
Control Module Part Number: 03L 997 557 M HW: 03L 906 023 A
Component and/or Version: R4 1.6l TDI H23 9983
Software Coding: 00114014032500080000
Work Shop Code: WSC 00066 000 00198
ASAM Dataset: EV_ECM16TDI02103L997557M 003003 (VW36)
ROD: EV_ECM16TDI02103L997557M.rod
VCID: 468388ABF97A4F7FE3-8012
1 Fault Found:

7308 - Intake Air Temp. Sensor (G42)
P0113 00 [172] - Signal too High
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 89
Mileage: 176146 km
Date: 2112.14.16
Time: 11:07:17

Engine speed: 2002.75 /min
Normed load value: 0.0 %
Vehicle speed: 33 km/h
Coolant temperature: 79 °C
Intake air temperature: -40 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.892 V
Unlearning counter according OBD: 40
Engine speed: 1701 /min
Vehicle speed: 1 km/h
Outside air temperature-Ambient temperature: 16.50 °C
Battery voltage: 13.6 V
Battery voltage: 13.6 V
Battery voltage: 13.6 V
Battery voltage: 13.6 V


Readiness: 1 1 0 0 0




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[Crasher]

I need to look at the wiring diagram, remind me in the morning.

[F1brett1]

@Crasher just a reminder


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[Crasher]

Ahh. now I am at work it makes more sense, a pre 2011 model Mexican built Golf estate, these suffer from wiring harness problems next to the inlet manifold flap motor where the harness ribs on the head.

It is interesting to note that your car has had Campaign 23F7 carried out to change the engine ECU from the original 03L 906 023 B to the 03L 997 557 M to deal with an earthing problem which causes cold start issues.

Below is the TPI about the problem, the edited version!

[F1brett1]

@Crasher Thanks I'll get looking sat after work i didn't even know it had a ecu replacement done. God I hate wiring issues Shame it won't make the car go puff lol the only issue iv'e had with the car is after the update was done was a injector fault and the windscreen freeze's on the inside in the winter.

I'll keep you updated mate.

Thanks once again

[F1brett1]

@Crasher I’ve check the wiring loom and no breaks or anything do you have any other ideas someone said to me the air mass meter but not sure.


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