PLUG AS 1P2377 - Caterpillar

PID 0171 FMI 04Conditions Which Generate This Code:The Engine Control Module (ECM) detects the following conditions:
The signal voltage from the ambient air temperature sensor is less than 0.2 VDC for more than eight seconds.
The "Allow Idle Shutdown Override" parameter is programmed to "Outside Temperature Based" or "J1587 Outside Temperature Based".
The ECM has been powered for at least two seconds.System Response:The ECM will default to 65 °C (149 °F) for outside air temperature. "DIAG" will be displayed next to the status for "Outside Temperature Sensor" on the Caterpillar Electronic Technician (ET).Possible Performance Effect:"Allow Idle Shutdown Override" is disabled while this code is active.Troubleshooting:Test Step 1. Perform the following diagnostic procedure: "Engine Temperature Sensor Open or Short Circuit - Test"Results:
OK - STOP