Reductant Quality Module- Transit
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The reductant quality module provides the reductant concentration to the PCM. The reductant quality module incorporates an ultrasonic transducer and sensor assembly, located at the bottom of the reductant tank. The sensor monitors reductant concentration percentage by calculating the speed of sound travel through the diesel exhaust fluid (DEF) and comparing it to an expected value. If this value is not met, the reductant is diluted or contaminated. The reductant quality module is integral to the reductant tank assembly. For addition information on the reductant level sensor, refer to the REDUCTANT HEATER AND SENDER ASSEMBLY description.