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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P0451-P0454 >> Circuit/System Description

Circuit/System Description

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

For an overview of the component/system, refer to: Evaporative Emission Control System Description

Circuit Description
5 V Reference Regulated voltage supplied by the control module.
Signal The control module input circuit has an internal resistance connected to ground.
Low Reference Grounded through the control module.
Component Description
B150 Fuel Tank Pressure Sensor The pressure sensor is a 3 wire piezoelectric pressure transducer.
The sensor measures the pressure in the component: Fuel Tank
K111 Fuel Pump Driver Control Module The control module contains a microprocessor used to process input data to control outputs.
The control module communicates with the engine control module via serial data.