01-20-2021, 03:12 PM
Reductant Temperature Sensor Circuit High
The reductant heater and sender assembly contains pickup tube for reductant pump module, an electric heating element, a reductant temperature sensor and an electrode type level sensor. The heating element is directly above pickup tubes inlet filter. When reductant temperature sensor detects the diesel exhaust fluid temperature dropping to the freezing point of 12°F (-11°C), the PCM will command the glow plug control module to provide voltage to heating element. The heating element thaws liquid reductant within reductant heater and sender assembly reservoir during cold ambient temperatures.
Cause:
Faulty Reductant Temperature Sensor
Reductant Temperature Sensor harness is open or shorted
Reductant Temperature Sensor circuit poor electrical connection
Symptoms:
Check engine light
The reductant heater and sender assembly contains pickup tube for reductant pump module, an electric heating element, a reductant temperature sensor and an electrode type level sensor. The heating element is directly above pickup tubes inlet filter. When reductant temperature sensor detects the diesel exhaust fluid temperature dropping to the freezing point of 12°F (-11°C), the PCM will command the glow plug control module to provide voltage to heating element. The heating element thaws liquid reductant within reductant heater and sender assembly reservoir during cold ambient temperatures.
Cause:
Faulty Reductant Temperature Sensor
Reductant Temperature Sensor harness is open or shorted
Reductant Temperature Sensor circuit poor electrical connection
Symptoms:
Check engine light
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