Diagnostic Aids

Code 70 sets when signal voltage falls outside of the normal possible range of the sensor and is not due to a refrigerant system problem. If problem is intermittent, check for opens or short in the harness or poor connections.

Fig 1: Code 70 Schematic (3.4L (VIN S)) High A/C Pressure

Fig 2: Code 70 Diagnostic Flow Chart (3.4L (VIN S)) High A/C Pressure