P16AD – Glow Plug Control Module Temperature Sensor Circuit Low Voltage

P16AD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P16AD Possible Causes

Faulty Glow Plug Control Module Temperature Sensor,Glow Plug Control Module Temperature Sensor harness is open or shorted,Glow Plug Control Module Temperature Sensor circuit poor electrical connection

P16AD Description

The glow plug control module (GPCM) has the ability to perform internal diagnostics for the temperature sensor circuit. The GPCM monitors the internal temperature sensor voltage and If the voltage is less than 0.21 V or greater than 4.94 V. The GPCM will send a message to the engine control module (ECM) to set the appropriate DTC.