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Home >> Chevrolet >> 2006 >> TrailBlazer 4.2 S, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L - DTC P2101 To P2444 >> DTC P2433 >> Circuit/System Verification
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Circuit/System Verification

With the ignition ON and the engine OFF, observe that the AIR pressure sensor parameter is nearly identical to the MAP sensor parameter.