Reductant Level Sensor - All Others
The reductant level sensor provides the reductant tank level and reductant quality state to the PCM. The reductant level sensor incorporates an ultrasonic transducer and sensor assembly, located at the bottom of the reductant tank. The transducer produces timed ultrasonic sound waves through the diesel exhaust fluid (DEF) and the sensor measures the return rate of the sound waves. As the DEF is consumed, the liquid level lowers and the return speed increases. Additionally, the sensor monitors reductant percentage by calculating the speed of sound travel through the DEF and comparing it to an expected value. If this value is not met, the reductant is diluted or contaminated. The reductant level sensor is integral to the reductant tank assembly.