What causes a P1194 code?

P1194 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 P1194 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P1194 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

P1194

Indicates that the fuel filter is very clogged

What it means

Fuel Pressure Sensor - High Resistance or Fuel Filter Restriction Detected. The engine control module (ECM) detects a significant pressure drop across the fuel filter assembly.