What causes a P2155 code?

P2155 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 P2155 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with P2155 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

P2155

P2155 - Fuel Injector Group D Supply Voltage Circuit Open

What it means

The Engine Control Module (ECM) has detected an open circuit condition in the power supply circuit for a specific group of fuel injectors (Group D), preventing them from firing.