DTC P0071: Ambient Temperature Sensor Performance: Description

Circuit is monitored with ignition on, engine coolant temperature more than 160°F (71°C) and no inlet air temperature sensor faults present. DTC will set after 5 warm-up cycles (engine coolant temperature increases from 40°F to 160°F or more) and odometer mileage has increased 196.6 miles. PCM senses ambient air temperature has increased less than 5.4°F. This is a 2-trip fault. Possible causes are: defective Inlet Air Temperature (IAT) sensor, high resistance in sensor ground circuit, high resistance in signal circuit or defective PCM.