totoya avevsis exhaust issus

[mankam]

I have toyota T3 xDCAT diesel 2 lts , about 30,000 on clock, While comimg to the highway my car suddenly make white thick smoke intermittently , my MPG is redused to 30-32 and not on dash board it shows mechanical issus light on ,
i wnat to know what is problem

[dmitsi]

DPF going into regen, burning off all the collected particles.

ETA, it's a DNPR system, combination of DPF and NOx reduction. If your car is not getting a chance to complete the regen then it'll start again when you next get going. You lose the power because your engine is concentrating on heating up the oxi-cat to burn off the particles.

Edited by dmitsi on Friday 21st November 16:31

[mankam]

can you explain me this ..... Very technical and what is remedy?
Thanks in advance

[dmitsi]

mankam said:

can you explain me this ..... Very technical and what is remedy?
Thanks in advance

No remedy, it is supposed to happen.
The DPF (diesel particulate filter) collects the diesel particulates and holds them in a filter to stop them going into atmosphere. Makes the exhaust cleaner. Means less black stuff out of your exhaust. When the filter has filled up to a certain weight it will start a regeneration as it can hold no more.

It will change the pilot and post injection to really heat up the filter, at a certain temp the particulates will start to burn off, the result of this is the plumes of smoke you see.

This is almost certainly what is causing the smoke, take the car out for a good long drive, get up to some high speeds and hopefully half an hour of that will have completed the cycle.

If it continues and you are worried, go to a garage.

[mankam]

this is right this White exhaust comes only when I come to motor way and try to accelerate
But but I am getting pwrmant warning symbol on my dashboard which was occasional earlierrr
Is it a good idea to go for diagnostic at toyota garrage
I have AA gold warrenty but they will not pay for diagnostics