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P0381 code, new GPCM?

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Old Dec 6, 2024 | 02:42 PM
  #1  
7.3Xcursion's Avatar
7.3Xcursion
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5th Wheeling
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P0381 code, new GPCM?

Hi all,

I got a SES light on my dash the other day. I pulled the codes and got a P0381 and a P0603. Forscan shows

===PCM DTC P0381===
Code: P0381 - Glowplug lamp circuit

Module: Powertrain Control Module

Diagnostic Trouble Code details

Glowplug lamp circuit

This DTC may be caused by :

Open circuit.

Short circuit

Possible causes are:

Harness wiring

Indicator bulb

PCM

Inspect connectors for signs of damage, water ingress, corrosion, etc.

I'm assuming this means I need a new GPCM, correct?
 
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Old Dec 6, 2024 | 05:32 PM
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01__Excursion's Avatar
01__Excursion
Cargo Master
Joined: Nov 2017
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From: Rock Hill, SC
This means you need to diagnose the issue, based on the suggestions given.
 
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Old Dec 6, 2024 | 06:43 PM
  #3  
7.3Xcursion's Avatar
7.3Xcursion
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Originally Posted by 01__Excursion
This means you need to diagnose the issue, based on the suggestions given.
I didn't know if there was a common issue with the GPCM, or if there was a common cause for the code. If there is, I'd start there before diving down the rabbit hole of diagnosing everything.
 
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Old Dec 7, 2024 | 11:03 AM
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corpsedub's Avatar
corpsedub
Mountain Pass
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Joined: Jul 2004
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It has been seen that the square connectors to the gpcm can get...fried. have you looked at the connectors and the harness around the gpcm?
 
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