I have a 2004 1HZ GXL landcruiser and the glow plug light is lighting up about 1min after start up while driving and staying on untill I turn it off. It even dose the same after starting with out driving or touching any thing else.

SOURCE: No glow plug light, car turns over but won't start, no CEL or codes

I don't have the solution but a possible help in diagnosing.  If you remove the water temperature sensor connector from the sensor, the glow plug light should stay on when you go to start the car.  Try leaving it on for 15 seconds and then start the car.  If it starts right away, it is your sensor.  If it doesn't, the good luck.  
The sensor is located on the right side of the engine near the top, at the back.  It is in the coolant fitting directly behind the hose from the rad, just left of the thermostat.  Be careful to disconnect the wires, and not remove the sensor, or you will loose a lot of coolant.  The sensor is held in by a separate plastic clip, and the harness just has a little built in clip on the side.  Hope you have small hands...

SOURCE: VW passat glow plug problem

Yes you have a defective glow plug relay if you have your owners manual you can find it and replace it, the unit also has a timer on it, if you don't have a book look for the glow plugs and follow the wires from the glow plugs to where they terminate there you will find the relay unit and replace it, to test the glow plugs you remove the wires and test each plug by pulling off the wire and with a cheep ohm meter touch one end to the glow plug and one end to ground if it swings almost al the way over it is ok, if it dos not move then that glow plug is bad. if you find 2 or more bad then replace them all, and if a glow plug has shorted and caused this problem you will have to replace the glow plug relay. Good luck.

Radio Code Pro

• 2200 Answers
• Posted on Jul 13, 2009

SOURCE: mondeo diesal 2002, glow plug light

Hi

The glow plug coming on on the Diesel Mondeo is an engine management fault indicator. The car goes into "limp mode" when this happens or in other words safety mode is triggered. This explains your loss of power.

To find the cause of this light coming on - the car will have to go on an OBD scanner at a service shop which will read the codes stored in the cars computer and give you an answer as to what is causing the fault to show.

Hope this helps - please remember to rate my answer as ratings are important to me as an expert on the site. Thank You.

SOURCE: had problems with vw caddy van starting when warm,...

2004 vw 2000sdi caddy van wont start some mornings you need to wind it over before it fires, immediately after it fires you can switch off ignition and it will start first time and continue to start all day. vw dealer says no fault codes present. gloplugs renewed, new battery,fuel problem? Has anyone come accross similar problem I

SOURCE: 100 series landcruiser glow plug light stays on

I have a 2005 1hz landcruiser, the "glow Plug Light" comes on when I release the accelerator pedal and then goes "off" when I accelerate - any ideas - thanks