P0345 Camshaft Position Sensor A Circuit Malfunction (Bank 2)

P0345 indicates a malfunction in Camshaft Position Sensor A circuit on Bank 2. The controller is not receiving the expected Bank 2 cam position signal.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not assume P0345 is only an electrical sensor failure; mechanical timing and cam target problems can produce the same symptom.

Symptoms of P0345

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0345

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Compare Bank 2 cam sensor A data, cam-crank sync, freeze-frame RPM, starting behavior, variable valve timing data, and related timing codes.
Inspect sensor power, ground, signal wiring, connector condition, oil contamination, sensor mounting, timing components, and reluctor or target condition.
Confirm the signal at the sensor and at the controller to separate a sensor fault from wiring, timing, or PCM input problems.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.