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Home >> Chevrolet >> 2023 >> Camaro ZL1, 2D Convertible, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (Engine Controls And Fuel - 3.6L - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P219A or P219B >> Circuit/System Description

Circuit/System Description

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The Fuel Trim Cylinder Balance diagnostic detects a rich or lean cylinder to cylinder air/fuel ratio imbalance. The diagnostic monitors the pre-catalyst heated oxygen sensor (HO2S) signal voltage over a predetermined sample period. An imbalance is indicated when multiple samples of the voltage are consistently higher than the desired value.

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