FORTUNER - Water in Diesel Filter warning light

[PieterOos]

Hallo all

On my way home tonight the 'Water in diesel filter' warning light start to blink.


Now a couple of observations:

• The filter was replaced approx 4000 km ago, together with injectors;
• The Sasol garage was tested by Sasol, and given a clean bill of health;
• I filled up at the same garage since then as it was tested clean;

Up to now I have never had to drain the water (85K km), why now suddenly in the span ~4000 km done since fitting a new filter? (Maybe the light only started to work when they replaced the filter )

Is it sufficient to drain and check the light, or do I need to replace the filter again to be sure? (Just YESTERDAY I took the vehicle back to diagnose the injectors again, just as a precautionary measure. Values were something like 0.7, all 4 perfect)

Thank you

[PieterOos]

For interest sake, this is what a ~4000 km old diesel filter looks like, I took the safe option and replaced the filter this morning:

[PieterOos]

Food for thought:

http://www.stuff.co.nz/dominion-post...n-dirty-diesel