CAT 3406E (Prefix 5DS or 1LW) Fault Code: 72 PID: 2 SPN: FMI: 11 Cylinder #2 Injector current fault

Posted by PerDiezel Solutions on January 13, 2026

The Engine Control Module (ECM) detects one of the following items after attempting to operate the injector:

•A low current condition (open circuit) exists in the wiring for the cylinder injector solenoid.
•A high current condition (short circuit) exists in the injector solenoid.

Probable Causes:

1) ECM Connection/Harness
2) Cylinder injector failure
3) Injector solenoid failure
4) Harness from ECM to valve cover connector
5) ECM failure
6) Injector harness under valve cover

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 72 PID: 1 SPN: FMI: 11 Cylinder #1 Injector current fault

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 71 PID: 43 SPN: FMI: 2 Key Switch Fault

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 69 PID: 26 SPN: FMI: 6 Auxiliary Output #01 current high

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 69 PID: 26 SPN: FMI: 5 Auxiliary Output #01 current low

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 68 PID: 191 SPN: FMI: 7 Transmission Not Responding

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 67 PID: 51 SPN: FMI: 6 Auxiliary Output #03 current high

WARNING!