What causes a P1341 code?

P1341 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 P1341 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1341 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

P1341

Cam signal corruption during startup – possible long crank

What it means

The ECM has detected irregular or missing pulses from the camshaft position sensor specifically during the engine cranking phase, preventing the fuel timing synchronization.