P0349 Camshaft Position Sensor A Circuit Intermittent (Bank 2)

P0349 indicates an intermittent Camshaft Position Sensor A circuit on Bank 2. The Bank 2 cam signal is dropping out or becoming unstable part of the time.

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 rely on a cold static test for P0349 if the code sets hot, during vibration, or under acceleration.

Symptoms of P0349

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 P0349

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

Review hot-start behavior, stall history, cam-crank sync loss, freeze-frame RPM, VVT movement, and related intermittent crank or cam codes.
Inspect connector tension, harness flex points, oil contamination, sensor mounting, target wheel condition, grounds, and wiring near heat sources.
Record cam signal data while heat-soaking, wiggling the harness, and road-testing to catch short dropouts.

Related OBD-II codes

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