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  1. #1
    Veteran Member Four Rings Whitee's Avatar
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    Aug 27 2014
    AZ Member #
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    AC Issues

    Just got my VCDS and scanned my car. Have a few pictures showing the codes. I replaced my A/C Pressure switch last night and the car still doesn’t blow cold at idle, only while moving.

    Does this point to an electrical issue of some sort of I replaced the sensor and it’s still not working? Any input would be appreciated.

    Apparently I can’t post a link with the new iPhone .

    Two codes 00256 Implausible Signal to AC Pressure Sensor

    01592 Air Quality Sensor No signal/Communication

    Here is the information:


    Address 09: Cent. Elect. Labels: 8K0-907-063.clb
    Control Module Part Number: 8K0 907 063 P HW: 8K0 907 063 P
    Component and/or Version: BCM1 1.0 H25 0380
    Software Coding: 26001091063CAF010000080300003D0D4F1C52080001016100 0000
    Work Shop Code: WSC 06325 123 12345
    VCID: 3C21375D16620AB782D-8068
    4 Faults Found:

    03020 - Local databus 2
    012 - Electrical Fault in Circuit
    Freeze Frame:
    Fault Status: 01101100
    Fault Priority: 2
    Fault Frequency: 96
    Reset counter: 195
    Mileage: 155360 km
    Time Indication: 0
    Date: 2018.09.09
    Time: 20:24:00

    00256 - A/C Pressure/Temperature Sensor (G395)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 3
    Fault Frequency: 3
    Reset counter: 234
    Mileage: 155372 km
    Time Indication: 0
    Date: 2018.09.10
    Time: 09:48:00

    01592 - Air Quality Sensor (G238)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 234
    Mileage: 155372 km
    Time Indication: 0
    Date: 2018.09.10
    Time: 09:48:00

    01592 - Air Quality Sensor (G238)
    008 - Implausible Signal
    Freeze Frame:
    Fault Status: 01101000
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 234
    Mileage: 155372 km
    Time Indication: 0
    Date: 2018.09.10
    Time: 10:12:00


    Address 08: Auto HVAC (8T1 820 043 AQ)

    20:04:30
    ERROR Refrigerant Pressure (G395)
    3.0 Compr. Shut-Off Request
    19.0°C Outlet Temp. Evaporator (G263)
    ERROR Air Quality Sensor (G238)
    ERROR Refrigerant Signal

    From my understanding, if the sensor reads below 1.8Bar than the system throws a fault. Could getting the system refilled take care of this, or is it def related to wiring? I noticed on my old sensor it had white residue on it which leads me to believe it was leaking....





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    Last edited by Whitee; 10-11-2018 at 06:21 PM.
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