SQ5 Q5/SQ5 Air con not switching on (2018/FY)

Registered User

  • Dec 21, 2020
  • #1
  • Hi all,
    I noticed on the drive back the air con would not switch on.
    It is on when starting the car but then flips to off and the other options are greyed out.

    Scanned for codes and I get the following:

    262914 — High Pressure Sensor
    B10AE 21 [008] — Signal Amplitude Too Low
    Intermittent — Confirmed — Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 5
    Fault Frequency: 31
    Reset counter: 89
    Mileage: 51811 km
    Date: 2020.05.12
    Time: 14:01:58

    Outside temperature: 13.50 °C
    Engine RPM: 1490 /min
    Compressor current: actual value: 0.00 A
    Temperature downstream of evaporator: 18.50 °C

    OBD11:
    High Pressure Sensor
    Lower limit not reached
    Fault Code: B10AE21

    I ran a Refrigerant Pressure Test and it came back with 0.80 bar (unsure if this is good or bad)

    It might be a regas and thats it or is this model also popular with the ol’ rock hitting compressor?

    Have got it booked in with Audi however I’m in limbo at the moment because of the Christmas break — Curios to see if anyone has seen this before?

    Thanks in advance

    Retrofitter — Audi — VW — Skoda — Seat

    • Dec 21, 2020
  • #2
  • If you require my services as a client, not DIY help, please Whatsapp 07974994143

    VAG RETROFITS- DIAGNOSTICS — FAULT FINDING — ELECTRICAL
    VCDS HEXNET- VAG CAN PRO

    Registered User

    • Dec 21, 2020
  • #3
  • RS3 S.

    Registered User

    • Dec 22, 2020
  • #4
  • Hi all,
    I noticed on the drive back the air con would not switch on.
    It is on when starting the car but then flips to off and the other options are greyed out.

    Scanned for codes and I get the following:

    262914 — High Pressure Sensor
    B10AE 21 [008] — Signal Amplitude Too Low
    Intermittent — Confirmed — Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 5
    Fault Frequency: 31
    Reset counter: 89
    Mileage: 51811 km
    Date: 2020.05.12
    Time: 14:01:58

    Outside temperature: 13.50 °C
    Engine RPM: 1490 /min
    Compressor current: actual value: 0.00 A
    Temperature downstream of evaporator: 18.50 °C

    My 2018 SQ5 did the same & it was sorted under warranty. Can’t remember what part had failed BUT it was a huge job to do,windscreen out & most of the dashboard to access the part. Mine was in for 2-3 weeks due to a delay on getting the part. Good luck.

    OBD11:
    High Pressure Sensor
    Lower limit not reached
    Fault Code: B10AE21

    I ran a Refrigerant Pressure Test and it came back with 0.80 bar (unsure if this is good or bad)

    It might be a regas and thats it or is this model also popular with the ol’ rock hitting compressor?

    Have got it booked in with Audi however I’m in limbo at the moment because of the Christmas break — Curios to see if anyone has seen this before?

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