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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Controls And Fuel - 6.0L (L96) - DTC P0351 To DTC P2636 And Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0451, P0452, P0453, P0454: Fuel Tank Pressure Sensor >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

P0451 

This DTC will set if the control module is unable to re-zero the fuel tank pressure sensor voltage within a calibrated range during the engine-off small leak test, P0442.

P0452 

The fuel tank pressure sensor voltage is less than 0.15 V for greater than 10 s.

P0453 

The fuel tank pressure sensor voltage is greater than 4.85 V for greater than 10 s.

P0454 

If, during the engine-off natural vacuum small leak test, P0442, the ECM detects an abrupt fuel tank pressure signal change, other than a refueling event, this DTC will set. An abrupt change is defined as a change of greater than 0.45 in H2O in the span of 1 s but less than 1 in H2O in 12.5 ms. This test must fail twice to set this DTC.

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