Diagnostic Aids

A Code 67 will store in PCM memory but will not turn on the SERVICE ENGINE SOON light. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connections or damaged harness. Perform intermittent check by monitoring circuit and code status while wiggling related wiring and connectors. If failure is induced, monitored circuit status will change rapidly and/or related code will set.

Fig 1: Code 67 Schematic (3.4L (VIN S)) A/C Pressure Sensor

Fig 2: Code 67 Diagnostic Flow Chart (3.4L (VIN S)) A/C Pressure Sensor