CAT 3406E (Prefix 1MM or 2WS) Fault Code: 00 PID: SPN: 171 FMI: 11 Ambient Air Temperature Data Lost

The Engine Control Module (ECM) detects the following conditions:

•The ECM is not receiving information about the ambient air temperature from the SAE J1587 data link.

Probable Causes:

1) ECM Connection/Harness
2) Truck batteries
3) Wiring between batteries & ECM
4) Fuses