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Home >> Pontiac >> 1994 >> Firebird Formula, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.4L >> ECM/Pcm Code Charts >> Code 42, Ic Circuit Open/Grounded >> Diagnostic Aids
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Diagnostic Aids

Scan tester does not have ability to help diagnose a Code 42 problem. See INTERMITTENTS in TESTS W/O CODES article in this section.

Fig 1: Code 42 Schematic (3.4L) IC Circuit Open/Grounded
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Fig 2: Code 42 Flow Chart (3.4L) IC Circuit Open/Grounded
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