LINES GP-FRONT 1339187 - Caterpillar

Which Generate This Code:The Electronic Control Module (ECM) detects the following conditions:
The signal voltage from the engine coolant temperature sensor is less than 0.2 Volts DC for more than eight seconds.
The ECM has been powered for at least two seconds.
Diagnostic code 0168-01 is not active.System Response:A warning will appear on the display on the control panel. The warning lamp or the shutdown lamp may illuminate and the warning horn may sound. If equipped, the diagnostic lamp will flash the diagnostic code. An active diagnostic code will be generated after eight seconds. The diagnostic code will be logged if the engine has been operating for more than seven minutes.The ECM will default to 90 °C (194 °F) for engine coolant temperature. "Voltage Below Normal" will be displayed next to the status for "Engine Coolant Temperature" on the electronic service tool.
Poor stability
Poor cold running
White smokeTest Step 1. Perform the following diagnostic procedure: Engine Temperature Sensor Open or Short Circuit - TestResults:
OK - STOP