Diagnostic Aids

Scan tester does not have ability to help diagnose a Code 42 problem. See INTERMITTENTS in TESTS W/O CODES - 3.4L/5.7L article in this section.

Fig 1: Code 42 Schematic (3.4L (VIN S)) IC Circuit Open/Grounded

Fig 2: Code 42 Diagnostic Flow Chart (3.4L (VIN S)) IC Circuit Open/Grounded