What causes a P0314 code?

P0314 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 P0314 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P0314 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

P0314

Single Cylinder Misfire - Cylinder Not Specified

What it means

The Engine Control Module detects a variation in crankshaft speed indicating a misfire occurred, but is unable to isolate the fault to a specific cylinder.