P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction (Bank 1)
Description: The test fails when the powertrain control module (PCM) can no longer detect the signal from the CMP sensor on bank 1.
Possible Causes: CMP circuit open.
CMP circuit short to GND.
CMP circuit short to PWR.
SIG RTN open (VR sensor).
CMP GND open (Hall-effect sensor).
CMP circuit short to CMP2 circuit (if equipped).
CMP incorrectly installed (Hall-effect sensor).
Damaged CMP sensor shielding.
Damaged CMP sensor.
Damaged PCM.

P0345 - Camshaft Position (CMP) Sensor Circuit Malfunction (Bank 2)
Description: The test fails when the powertrain control module (PCM) can no longer detect the signal from the CMP sensor on bank 2.
Possible Causes: See the possible causes for DTC P0340.
Diagnostic Aids: See the diagnostic aids for DTC P0340


P0344 and P0349 aren't listed but I'm assuming the point back to the cam position sensor like you thought.

Others will be able to help you better, just figured I'd pull up what the service manual said for possible causes.