What this code means

Component / fault: Intake heater.
Reported detail: current above normal or shorted to ground.
FMI 6 in the SAE J1939 / Caterpillar CDL convention means: Current above normal or grounded circuit — see the full FMI reference table.

On a Caterpillar display this code may appear as MID/CID 70 with FMI 6, or in the older PID/SID style. Wording of the reported detail follows the public Caterpillar fault-code listing cited below.

First checks (general, for this failure type)

Circuit current is above normal. Look for a shorted coil or solenoid, or a wire chafed through to ground.

These are general electrical checks for FMI 6 faults, not a substitute for the model-specific test procedure. If the fault is active and the machine is derated or shut down, follow the service manual for your model and serial prefix.

Need the part?

If the checks point to a failed sensor, solenoid or harness part, send us the code (70 / FMI 6), the machine model and serial number — we quote genuine and OEM replacement parts for export.

Same component, other failure modes

FMI 5