Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection
How do I Fix the Code P163D Cadillac?
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
Does your Cadillac have Safety Recalls? → Check here
What is the Cost to Diagnose the Code P163D Cadillac?
Labor: 1.0
The cost of diagnosing the P163D Cadillac code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
What are Code P163D Cadillac Possible Symptoms?
Engine Light ON (or Service Engine Soon Warning Light)
Code P163D Cadillac Description
The Glow Plug Control Module (GPCM) has the ability to perform internal diagnostics for the voltage and output state of the glow plugs. If the GPCM receives a command to turn on the glow plugs, and Ignition 1 Signal voltage is low this code will set. If the GPCM detects voltage on the glow plug circuits while glow plugs are not commanded on this code will set. If the GPCM detects a ground offset of 1.5 volts between the GPCM ground and the glow plug ground circuit this code will be set. The GPCM will send a message to the Engine Control Module (ECM) to set this Diagnostic Trouble Code (DTC). P163D Cadillac Code - Glow Plug Control Module Secondary Circuit
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