From what I gather the codes represent a camshaft position sensor circuit fault on the intake cam. When I measure the harness, with the CPS disconnected I get 5V on red/#1, Ground on black/#2 and 0.96V on blue/#3. 2.5V - 5V on blue with the CPS connected. Blue is the CPS output, It is not going to ...

P0340 ECM-3000 Camshaft position (CMP) sensor, intake Faulty signal or signal missing P0347 ECM-3010 Camshaft position (CMP) sensor, exhaust Signal too low P0348 ECM-3010 Camshaft position (CMP) sensor, exhaust Signal too high Dead battery could be the reason for the switch from P0348 to P0347. Both...

P0340 ECM-3000 Camshaft position (CMP) sensor, intake Faulty signal or signal missing P0344 ECM-3000 Camshaft position (CMP) sensor, intake Faulty signal or signal missing P0342 ECM-3000 Camshaft position (CMP) sensor, intake Signal too low. Intermittent fault P0342 ECM-3000 Camshaft position (CMP) ...

Second time something similar has come up in the last few months, can see this thread- https://www.matthewsvolvosite.com/forums/viewtopic.php?f=10&t=83597#p456189 as well. Good to note that the camshaft codes ECM-3000/ECM-340 (intake), ECM-3010/ECM-341 (exhaust) "too high and too low" ...