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Home >> Chevrolet >> 1990 >> Caprice Base, 5.0 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.3L TBI >> Pcm/BCM Code Charts >> Code 42, Est Circuit Open Or Grounded >> Notes
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Code 42, Est Circuit Open Or Grounded: Notes

Code 42 indicates ECM has seen an open or short to ground in HEI EST or by-pass circuit.

NOTE: Test numbers refer to numbers on diagnostic chart.
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