2002 alh Glow Plug issue 16764 and 18027

Golfer49

Member
Joined
Feb 2, 2013
Location
St. Marys, GA
TDI
2002 Golf TDI
Trouble codes showing are 16764 and 18027. I check the glow plugs using the Glow Plug 101 sticky (great write-up!). Does anyone have experience with a bad GP harness? Does the ecu always show both trouble codes, or do I have an issue with something else? Maybe the GP relay as well? Car is '02 4-wire harness.
 

Golfer49

Member
Joined
Feb 2, 2013
Location
St. Marys, GA
TDI
2002 Golf TDI


Does anybody know what the other connector is for? I just pulled out old gp harness and plugged in new one. Came across this other connector in cable tray that routes wires back toward ecu. The other connector is same size as the gp harness connector. This is for trouble codes P0380 (16764) and P1619 (18027).
 
Last edited:

muzy

Veteran Member
Joined
Aug 19, 2012
Location
Southern Alberta
TDI
02 jetta TDI
Looks like GP harness, when I changed mine it would have been easier to leave the old one.
Looks like that's what was done to yours.
Cheers
 

UhOh

Top Post Dawg
Joined
Dec 24, 2014
Location
PNW
TDI
2000 & 2003 Golf GLS (2005 Mercedes E320 CDI)
It's for "confusion!":D As muzzy says, someone replaced the harness and left the old one in there: might want to mark it as "bad" so the next person doesn't end up scratching their head.
 

Golfer49

Member
Joined
Feb 2, 2013
Location
St. Marys, GA
TDI
2002 Golf TDI
Replaced gp harness, then gp relay, same error codes. Replaced ecu... error codes never came back. It's been awhile, but wanted to close out the thread case someone else experiences same issues.
 
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