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Home >> Chevrolet >> 2009 >> TrailBlazer 4.2 S, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P0366 T0 DTC P2544 >> DTC P0366 >> Conditions for Setting the DTC >> P0366 - Near Engine Start, CMP Fast Event Based Test
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P0366 - Near Engine Start, CMP Fast Event Based Test

The ECM detects the incorrect number of CMP sensor pulses in 2 revolutions of the crankshaft, which is usually within 1 second.

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