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Reset the ECM with VIDA. It'll work for awhile.
 

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I mean you could fool the pressure sensor by giving it the value it wants to see.
 

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Well either replicate the voltage it wants or get a pressurized cylinder and attach the sensor to it.
 

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The fact that there's a Volvo OEM kit for the A/C delete makes me think that there must be an official software fix. It's probably dealer-only but I'm sure it exists.
 

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#A68 #B8 Signal air conditioning (A/C) pressure sensor U=0.9 V (at approximately 20°C) - U increases with pressure in the air conditioning (A/C) system

That's what I found it VIDA... However, I agree the SW update must exist. I'd call the dealer and reference the AC delete kit PN.
 
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