Hejdu
Posts: 2
Joined: Tue Mar 30, 2021 9:41 am

AC pressure sensor failure

Tue Mar 30, 2021 9:57 am

Hi all,

I recently got a 2019 e-Golf and ran a full Vcds auto scan. It gave me a faulty pressure sensor 1, tried clearing the error but it returned immediately.

Address C5: Therm. mgt. (J1024) Labels:* None
Part No SW: 5GE 907 458 C HW: 5GE 907 458
Component: TME-Min H20 0203
Serial number: 0092721
Coding: 02
Shop #: WSC 00029 028 00019
ASAM Dataset: EV_ThermContrVISAU49X 001021
ROD: EV_ThermContrVISAU49X_VW37.rod
VCID: 45D75109652218F3FC5-8010

A/C pressure/coolant temperature sensor:
Subsystem 1 - Part No SW: 4M0 959 603 C HW: 4M0 959 603 C
Component: G395 pT-Sens1 H11 0010

Auxiliary Air Heater Control Module/PTC:
Subsystem 2 - Part No SW: 12E 963 231 G HW: 12E 963 231 G
Component: J848 HV-PTC H09 0208
Serial number: LR182743003810000282

A/C compressor sub:
Subsystem 3 - Part No SW: 5QE 816 803 E HW: 5QE 816 803 E
Component: J842 eKK H03 0010

A/C pressure/coolant temperature sensor 2:
Subsystem 4 - Part No SW: 4M0 959 603 C HW: 4M0 959 603 C
Component: G826 pT-Sens2 H11 0010

A/C pressure/coolant temperature sensor 3:
Subsystem 5 - Part No SW: 4M0 959 603 C HW: 4M0 959 603 C
Component: G827 pT-Sens3 H11 0010

A/C pressure/coolant temperature sensor 4:
Subsystem 6 - Part No SW: 4M0 959 603 C HW: 4M0 959 603 C
Component: G828 pT-Sens4 H11 0010

A/C pressure/coolant temperature sensor 5:
Subsystem 7 - Part No SW: 4M0 959 603 C HW: 4M0 959 603 C
Component: G829 pT-Sens5 H11 0010

Expansion valve 1 for refrigerant:
Subsystem 8 - Part No SW: 4M0 816 682 D HW: 4M0 816 682 D
Component: N636 EV1_KaMi H12 0102
Serial number: 00000000000120428433

Expansion valve 2 for refrigerant:
Subsystem 9 - Part No SW: 4M0 816 682 D HW: 4M0 816 682 D
Component: N637 EV2_KaMi H12 0102
Serial number: 00000000000120428449

Expansion valve 3 for refrigerant:
Subsystem 10 - Part No SW: 4M0 816 682 D HW: 4M0 816 682 D
Component: N638 EV3_KaMi H12 0102
Serial number: 00000000000120428426

Shut-off valve 1 for refrigerant:
Subsystem 11 - Part No SW: 4M0 816 703 B HW: 4M0 816 703 B
Component: V424 AV1_KaMi H12 0102
Serial number: 00000000000140428229

Shut-off valve 4 for refrigerant:
Subsystem 12 - Part No SW: 4M0 816 703 B HW: 4M0 816 703 B
Component: N642 AV4_KaMi H12 0102
Serial number: 00000000000140428227

Shut-off valve 5 for refrigerant:
Subsystem 13 - Part No SW: 4M0 816 703 B HW: 4M0 816 703 B
Component: N643 AV5_KaMi H12 0102
Serial number: 00000000000140424192

1 Fault Found
59031 - Refrigerant Pressure/Temperature Sensor 1
P1C59 00 [047] - Faulty
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 3
Fault Frequency: 1
Mileage: 45190 km
Date: 2021.03.25
Time: 19:37:43


It looks like the ac system has 5 sensors, with Sensor 1 malfunction - see readout in picture, seems like it is only the pressure part:

Image

Is this the G395 sensor and is it a known problem?

Thanks
Last edited by Hejdu on Tue Mar 30, 2021 11:52 am, edited 3 times in total.

f1geek
Posts: 827
Joined: Fri Jan 23, 2015 1:18 pm
Location: SF Bay Area

Re: AC pressure sensor failure

Tue Mar 30, 2021 10:39 am

Have not heard of this before. Does your car heating and A/C work? If not, what error do you see on the dashboard?
2017 e-Golf LE, Multi Coat White with Black Vegan Leather interior

Hejdu
Posts: 2
Joined: Tue Mar 30, 2021 9:41 am

Re: AC pressure sensor failure

Tue Mar 30, 2021 11:04 am

The heater (heat pump) seems to work fine (I get hot air blowing and a warm car every morning when I leave my home), but here in Denmark the AC has not been tested yet - too cold. Nothing is showing up on dashboard.

It seems to be the sensor just after the compressor:

Image

f1geek
Posts: 827
Joined: Fri Jan 23, 2015 1:18 pm
Location: SF Bay Area

Re: AC pressure sensor failure

Tue Mar 30, 2021 12:07 pm

Interesting. I wonder if the heat is being only provided by the PTC as I suspect that pressure sensor is required for the heat pump to work whether in a cooling cycle or heating cycle. I hope it is easy to replace.
2017 e-Golf LE, Multi Coat White with Black Vegan Leather interior

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