This Exhaust Fluid Level Sensor Sending Unit accurately monitors the level of Diesel Exhaust Fluid (DEF) in the tank, ensuring the Selective Catalytic Reduction (SCR) system operates correctly to reduce emissions. Built with corrosion-resistant materials and precise float mechanisms, it provides reliable readings, unlike a faulty sensor that may give inaccurate level indications or fail to report altogether. Operators may notice DEF system warning lights, reduced engine power, or the vehicle refusing to start if the DEF level is not properly communicated due to a failing sensor.
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Disconnect main battery before working on electrical components. Use dielectric grease on all connector pins. Check ground connections — most electrical faults trace to poor grounds. Test with multimeter before installing new parts.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
A failing exhaust fluid level sensor may initially trigger a DEF system warning light on the dashboard, or display an inaccurate DEF level. If ignored, the SCR system may not function correctly, leading to increased emissions and potential engine derating or shutdown. The ultimate consequence is the inability to operate the vehicle legally and efficiently due to emissions non-compliance.
Ensure the DEF tank is clean and free of any contaminants before installing the new sensor to prevent immediate malfunction. Do not force the sensor into the tank opening; it should seat smoothly.
Inspect the DEF tank for any sediment or crystallization and flush if necessary when replacing the exhaust fluid level sensor.