Why does the immobilizer system disable fuel injectors during an anti-theft system fault?

The immobilizer system disables fuel injectors during an anti-theft system fault primarily to prevent higher hydrocarbon (HC) emissions. When the fuel injectors are disabled, fuel is not introduced into the engine cylinders, which results in no combustion occurring. This directly correlates to a reduction in HC emissions, as unburned fuel cannot contribute to higher levels of hydrocarbons being released into the exhaust.

High levels of HC emissions can indicate inefficient combustion, which often occurs when fuel is not burned properly, leading to more pollutants being emitted. By disabling the injectors in situations where the anti-theft system has detected a fault, the system actively works to minimize environmental impact and ensure compliance with emissions regulations.

While higher carbon monoxide (CO) and oxygen (O2) levels can also be concerns in certain conditions, the immediate goal of the immobilizer system focusing on fuel injection is primarily to curb undesirable HC emissions. This emphasis reflects the broader objective of vehicle emission control, which prioritizes reducing hydrocarbons.