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DTC P0098: Intake Air Temperature Sensor 2 Circuit High

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0098: INTAKE AIR TEMPERATURE SENSOR 2 CIRCUIT HIGH

Description:  Indicates the sensor signal is greater than the self-test maximum. The intake air temperature 2 (IAT2) sensor maximum is 4.6 volts.
Possible Causes: 
  • Open circuit in the harness
  • IAT2 circuit short to voltage
  • Incorrect harness connection
  • Damaged IAT2 sensor
Diagnostic Aids:  Monitor the IAT2 PID value. A typical IAT2 temperature should be greater than the IAT1 temperature.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
Flex GTDI,
MKS 3.5L,
MKT 3.5L,
Taurus GTDI
GO to PINPOINT TEST DN .
All others GO to PINPOINT TEST DU .