Odd numbered glow plug codes?
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Joined: Nov 2005
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Odd numbered glow plug codes?
So the other day I found my high pressure oil leak. On the drivers side. I repaired that and the truck started up great. Now for a while it would start and die. Actually started like it was missing then die. I chalked it up as air in the system. Well it's been maybe a month. Still doing it on cold mornings. I have to throttle it to get it running. But once it runs. No miss no issues. I checked for codes today and got all the odd numbered glow plugs. "Passenger side" Is the gp module Going out or did I forget to hook something up? I have never had a problem with glow plugs until I messed with it. I did disconnect the module because I thought I was going to take the passenger valve cover off but I didn't have to. Thanks
Lead Driver
Joined: May 2014
Posts: 6,545
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From: Virginia Beach VA
And you tried unplugging it and then plugged it back in making sure the connector snapped/clicked?
Most likely the module if that doesn't work.
Try plugging the truck in at night, will help it start. It's missing because those cylinders are not firing. After several strokes, a little heat builds, they fire.
Most likely the module if that doesn't work.
Try plugging the truck in at night, will help it start. It's missing because those cylinders are not firing. After several strokes, a little heat builds, they fire.
Senior User
Joined: Mar 2006
Posts: 330
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Before you buy a module, eliminate other possibilities.
First look for the 4 wire connector (1st picture) and make sure it is connected. I don't know what year you are working on, but on this 2006 it is located right over the valve cover and just behind the intercooler tube.
Second, you can unplug the connector and test that your glow plugs are good. Take a multimeter and check resistance by checking each wire at this connector. Red lead at connector and black lead on battery ground post. If your glow plugs are good, you should get approx 0.8 ohms. If you get something close to this value, that is good enough for this test right now. If all 4 wires passed this test, then your glow plugs and the wiring from this connector to plugs are okay.
Last, you plug this connector back and then you disconnect the connector at the glowplug module. Test the wires (picture 2)the same way. If you are able to read the correct glowplug resistance at this plug, then the only other fault can be a bad glowplug module or the connector to the gpm is not making contact.
First look for the 4 wire connector (1st picture) and make sure it is connected. I don't know what year you are working on, but on this 2006 it is located right over the valve cover and just behind the intercooler tube.
Second, you can unplug the connector and test that your glow plugs are good. Take a multimeter and check resistance by checking each wire at this connector. Red lead at connector and black lead on battery ground post. If your glow plugs are good, you should get approx 0.8 ohms. If you get something close to this value, that is good enough for this test right now. If all 4 wires passed this test, then your glow plugs and the wiring from this connector to plugs are okay.
Last, you plug this connector back and then you disconnect the connector at the glowplug module. Test the wires (picture 2)the same way. If you are able to read the correct glowplug resistance at this plug, then the only other fault can be a bad glowplug module or the connector to the gpm is not making contact.
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