P0347 - Camshaft Position Sensor 'A' Circuit Low (Bank 2)

P0347 indicates that the Engine Control Module (ECM/PCM) has detected a voltage signal from the Camshaft Position (CMP) sensor 'A' on Bank 2 that is lower than the expected range (typically near ground). Bank 2 is the bank of cylinders that does not contain cylinder #1. This sensor provides critical timing information for fuel injection, ignition sparking, and Variable Valve Timing (VVT) systems via a Hall-effect or variable reluctance signal. A 'Circuit Low' fault typically suggests a short to ground in the signal wire or an internal sensor failure.