A systems for detecting level sensor malfunction or tampering based on reductant consumption and determining when to initiate a quality check of reductant used in an aftertreatment system are disclosed. The system comprises a memory storing instructions and a processor executing the instructions to perform a process including: receiving dosing data associated with an amount of DEF supplied to the aftertreatment system; receiving tank level data from a level sensor in a DEF tank; comparing the dosing data with the tank level data; and based on the comparison: initiating, by the one or more processors, a quality check; and/or determining, by the one or more processors, a possible error requiring further diagnostics; and causing to present, by the one or more processors, an indication that the quality check is being initiated and/or that a possible error requires further diagnostics on a display.

A systems for detecting level sensor malfunction or tampering based on reductant consumption and determining when to initiate a quality check of reductant used in an aftertreatment system are disclosed. The system comprises a memory storing instructions and a processor executing the instructions to perform a process including: receiving dosing data associated with an amount of DEF supplied to the aftertreatment system; receiving tank level data from a level sensor in a DEF tank; comparing the dosing data with the tank level data; and based on the comparison: initiating, by the one or more processors, a quality check; and/or determining, by the one or more processors, a possible error requiring further diagnostics; and causing to present, by the one or more processors, an indication that the quality check is being initiated and/or that a possible error requires further diagnostics on a display.

A fuel theft prevention system for a vehicle including: at least one processor; and a memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the system to: receive, from a first sensing system, first activity data; determine, based on the first activity data, a first confidence value indicative of whether the activity is suspicious; receive fuel data indicative of a fuel level in the fuel tank; and cause, based on the first activity data and the fuel data, at least one mitigation action to be taken when the fuel level decreases by a threshold amount, wherein the threshold amount includes a first amount when the first confidence value is a first value and a second amount when the first confidence value is below the first value, and wherein the second amount is greater than the first amount.

A fuel theft prevention system for a vehicle including: at least one processor; and a memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the system to: receive, from a first sensing system, first activity data; determine, based on the first activity data, a first confidence value indicative of whether the activity is suspicious; receive fuel data indicative of a fuel level in the fuel tank; and cause, based on the first activity data and the fuel data, at least one mitigation action to be taken when the fuel level decreases by a threshold amount, wherein the threshold amount includes a first amount when the first confidence value is a first value and a second amount when the first confidence value is below the first value, and wherein the second amount is greater than the first amount.

A fuel theft prevention system for a vehicle including: at least one processor; and a memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the system to: receive, from a first sensing system, first activity data; determine, based on the first activity data, a first confidence value indicative of whether the activity is suspicious; receive fuel data indicative of a fuel level in the fuel tank; and cause, based on the first activity data and the fuel data, at least one mitigation action to be taken when the fuel level decreases by a threshold amount, wherein the threshold amount includes a first amount when the first confidence value is a first value and a second amount when the first confidence value is below the first value, and wherein the second amount is greater than the first amount.