A diagnostic procedure involving the introduction of visible vapor into a vehicle’s evaporative emission control system (EVAP) is employed to identify leaks. This technique allows technicians to visually pinpoint breaches in the system’s integrity. For instance, a technician may perform this test on a vehicle exhibiting a diagnostic trouble code related to an EVAP system leak, such as a small or large leak code.
The ability to quickly and accurately detect leaks in the EVAP system is paramount for several reasons. Addressing these leaks ensures compliance with environmental regulations by preventing the release of harmful fuel vapors into the atmosphere. Moreover, identifying and repairing these issues can improve fuel economy and overall vehicle performance. Historically, leak detection methods were less precise and more time-consuming, leading to increased repair costs and potential environmental impact.
