Diagnostic Aids
When replacing IAT sensor, check TEMPERATURE TO RESISTANCE VALUES table. A "shifted" (mis-scaled) sensor could result in poor driveability complaints. If Codes 22, 31 and 41 are also set, problem is open in sensor ground circuit.
An intermittent condition may be caused by poor connection, rubbed-through insulation, or a broken wire inside insulation. Check ECM harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal-to-wire connections before component replacement.