Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Refrigerant Circuit Pressure Sensor -G805
Installation Location
Refrigerant Circuit Pressure Sensor -G805- replaces the High Pressure Sensor -G65-. It is located in the high-pressure line between the condenser and the expansion valve. Refrigerant Circuit Pressure Sensor -G805- is connected directly to the Climatic/Climatronic Control Module by a LIN Bus.
Signal Utilization
The actual refrigerant pressure in the refrigerant circuit and the required engine load is calculated using the signals.
DSO Waveform
The Digital Storage Oscilloscope (DSO) waveform looks completely different from the previous High Pressure Sensor -G65- waveform.
Effects of Failure
If the pressure signal fails, the cooling function is deactivated.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.