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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0446 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P1463: EVAP System Leak Detection Pump to Fuel Tank Restriction >> Circuit/System Description

Circuit/System Description

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The EVAP system uses a EVAP leak detection pump to test for system leaks. The EVAP leak detection pump assembly consists of the following components:

This test determines if there is a restriction between the EVAP System Leak Detection Pump and fuel tank. A restriction will cause the vacuum level, as measured by the EVAP System Leak Detection Pump pressure sensor, to quickly increase beyond a calibration threshold in a short period of time if, there are no other leaks.

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