| 摘要 |
The objective of the present invention is to provide a liquid level sensor abnormality detecting device and abnormality detecting method with which it is possible to detect in a short time whether or not an abnormality has occurred in a liquid level sensor, which is provided in a storage tank storing a reducing agent to be injected into an exhaust gas passage of an internal-combustion engine, and which detects a residual quantity of an additive. Provided is a liquid level sensor abnormality detecting device which is provided in a storage tank storing a reducing agent to be injected into an exhaust gas passage of an internal-combustion engine, and which detects abnormalities occurring in the liquid level sensor, characterized in being provided with: a signal acquiring unit which acquires a signal output by the liquid level sensor; and an assessing unit which, if certain detection conditions are satisfied, uses the signal acquired by the signal acquiring unit to assess whether or not an abnormality has occurred in the liquid level sensor. |
