|P009A – Intake Air Temperature /Ambient Air Temperature Correlation|
|Description: The DTC indicates that the intake air temperature (IAT) and ambient air temperature (AAT) sensor readings differ by more than a calibrated value.
Possible Causes: • Biased IAT or AAT sensor
• Damaged IAT or AAT sensor
Diagnostic Aids: Make sure the IAT, AAT and engine coolant temperature (ECT) sensor readings are within 18°C (32.4°F) of each other after 6 to 8 hours at a stabilized ambient temperature.