OBD code P0099 means that the Powertrain Control Module (PCM) has detected an intermittent input signal from the Intake Air Temperature (IAT) sensor 2 circuit. The PCM uses the IAT input signal and the Mass Air Flow (MAF) sensor input signal to calculate fuel delivery and ignition timing strategy.
What causes the problem of Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic?
Open or shorted IAT sensor 2 wiring and/or connectors Defective IAT sensor 2 Faulty MAF sensor Broken intake air inlet pipe
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