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P0119 – Engine Coolant Temperature (ECT) Sensor 1 Circuit Intermittent/Erratic

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P0119 – Engine Coolant Temperature (ECT) Sensor 1 Circuit Intermittent/Erratic
Description:                 Indicates the ECT circuit became intermittently open or shorted while the engine was running.
Possible Causes:       
 
Damaged harness
 
Damaged sensor
 
Damaged harness connector
Low engine coolant
Diagnostic Aids:          Monitor the ECT or the CHT on a scan tool, look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.
Related Topics  P0140 - O2 Circuit No Activity Detected (Bank 1, Sensor 2)
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