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Slow loss of refrigerant or A/C system leakage

Q: How to fix Slow loss of refrigerant or A/C system leakage in Skoda Karoq?

Voltage verification at the sensor plug. If there is no voltage on the signal pin, cut the conduit at a distance of 20-30 cm from the sensor and repair the broken LIN bus cable. In case of physical leakage of the sensor - replace the G395 pressure sensor with a new one.

in Skoda Karoq (2008-2024)

Symptoms

No cold air from vents

DTC error codes

00819

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Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

(NU)

Refrigerant: R1234yf Amount (g): 450-500g Oil: PAG YF ISO 46 Oil (ml): 120 - 140ml

Platforma ND7

Refrigerant: R1234yf Amount (g): 460g Oil: - Oil (ml): - ml

Platforma NU7

Refrigerant: R134a Amount (g): 500g Oil: - Oil (ml): - ml

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Slow loss of refrigerant or A/C system leakage

Symptoms

DTC error codes

A/C Technical Specifications

Other problems in Karoq

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