P16A8 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P16A8 – Glow Plug Control Module Temperature – Intake Air Heater Temperature Not Plausible

 

P16A8 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P16A8 Possible Causes

 

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

 

P16A8 Description

 

The glow plug control module has the ability to perform internal diagnostics for voltage and output state of the glow plugs. If the difference between the internal temperature of the glow plug control module and the internal temperature of the intake air heater module is greater than 20?? (68??), this DTC will set. The glow plug control module will send a message to the engine control module (ECM) to set this DTC.