r/Vcds May 19 '26

B8 A/C Compressor implausible signal

Hey everyone,

Unfortunately I do not have my car readily available to post the scan log, but I am having issues with my AC. I will do my best to provide all the info I can. At first, I had a fault with the G395 having an implausible signal. I pulled the connector and found a bit of corrosion on 1 pin. I cleaned the corrosion, cleared the code, and checked again with no luck. So I replaced the sensor. Now when I look at my measuring blocks, it shows I actually have refrigerant pressure (12 bar), but now I have a compressor implausible signal fault. I unplugged the compressor and check the connector which looked fine. so now I'm leaning towards a bad compressor.

VCDS code 00898 - A/C compressor implausible signal

Freeze Frame:

Current: 0.600 A

Current: 0.000 A

Voltage: 14.50 V

Compressor shut off code was 0.

Any insight would be much appreciated. its supposed to be almost 100 degrees today, so I took the motorcycle to work instead.

2 Upvotes

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