Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

P0451, P0454

A restriction in the vent system could prevent fuel vapor pressure from bleeding off fast enough. If the pressure cannot bleed off fast enough, the re-zero procedure may not complete successfully, which could cause this DTC to set.
Ensure that the fresh air inlet, reference port, or vent of the component is unobstructed: B150 Fuel Tank Pressure Sensor