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code 42

Old Mar 2, 2007 | 08:26 PM
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From: POMONA, CA
Car: 91 Camaro Z28
Engine: V8 5.0L
Transmission: auto
code 42

42 The EST signal did not change when the ECM applied bypass voltage to the ignition module.
I just got this code today when i start up my 91 Z28 5.0L TPI, then it just completely cut offs, like the fuel pump makes this bizarre wierd buzz noise. What does it mean and precautions should I take?
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