P16AA – Intake Air Heater Temperature Sensor Circuit Low Voltage

P16AA Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P16AA Possible Causes

Faulty Intake Air Heater Temperature Sensor,Intake Air Heater Temperature Sensor harness is open or shorted,Intake Air Heater Temperature Sensor circuit poor electrical connection

P16AA Description

The intake air heater has the ability to perform internal diagnostics for the temperature sensor circuit. The intake air heater monitors the internal temperature sensor voltage and if the voltage falls outside the calibrated threshold, the intake air heater sends a message to the Glow Plug Control Module (GPCM) and then the GPCM sends a message to the Engine Control Module (ECM) to set the appropriate Diagnostic Trouble Code (DTC).