What causes a P0349 code?

P0349 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a P0349 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0349 active.

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

OBD-II

P0349

Camshaft Position Sensor Circuit Intermittent Range/Performance

What it means

The Engine Control Module (ECM) detects an intermittent or erratic signal from the Camshaft Position Sensor (CMP) which disrupts synchronization between the crankshaft and camshaft.