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2002 VW Jetta TDI

Tiny
KSEVERANCE
  • MEMBER
  • 2002 VOLKSWAGEN JETTA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 105,000 MILES
Unable to start my VW 2002 Jetta TDI. Fault codes are PO725 Engine speed circuit malfunction; P1780 manufacture control transmission; and P1850 manufacture control transmission. I also noticed that the glow plug light will not come on when I try to start the cold engine. These codes were read from an Actron OBDII auto scanner. The starter turns engine over like normal, but it will not start. I did have the battery out to charge up and pulled fuses out to see if there was a draw on the battery with the key in the off position, but discovered there wasn't a draw on the battery. I checked the fuses for the glow plug and they are okay. The vehicle will not start now. What is the problem with the vehicle?

describe your problem.
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Thursday, January 6th, 2011 AT 1:23 AM

2 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Did you find and check the 50amp glow plug fuse?
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Friday, January 7th, 2011 AT 8:50 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
If the 50Amp fuse is ok, check the glow relay also note that the relay feed power to the glow plugs in groups of 2, that is one power wire feeds 2 glow plugs and there are 2 feeds out of the relay.

Mark (mhpautos)
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Friday, January 7th, 2011 AT 10:34 PM

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