Actually I would prefer Volvo codes like ECM-XXXX at least for first 2 codes.
Plus A/C pressure sensor and intake pressure sensor are using 5v voltage from the same line so if one of the sensors are faulty that can impact the other. (in a case 5v is shorted or almost shorted to ground).
MAF is also using this line (5v).
2002 XC70 ECU Issues... worth fixing?
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doublebug
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Re: 2002 XC70 ECU Issues... worth fixing?
If you have questions about Volvo firmware ask me. I may know an answer 
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