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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0446-DTC P31BF And Symptoms) >> Diagnostic Information and Procedures >> DTC P0451-P0454 or P1464 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

P0451 

The ECM detects the difference between the fuel tank pressure sensor and the EVAP leak detection pump pressure is greater than 0.747 kPa (0.11 PSI) for greater than 0.1 s.

P0452 

The ECM detects the fuel tank pressure sensor voltage is less than 0.15 V for greater than 0.01 s.

P0453 

The ECM detects the fuel tank pressure sensor voltage is greater than 4.85 V for greater than 0.01 s.

P0454 

This DTC will detect intermittent tank vacuum sensor signals that would have caused the EVAP leak detection pump small leak test to abort due to an apparent re-fueling event.

P1464 

The passive portion of the diagnostic runs when the propulsion system goes active, the vehicle has soaked for a minimum amount of time, the EVAP leak detection pump vacuum pump has been off for a minimum amount of time, and purge is not enabled.

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