Lexus smoke

[pellump]

Hello how are you guys ,I need you help I have lexus is 220d years 2009 it's good car drive perfect nothing problem from the date I buy it but only problem it's the grey smoke come out from exhaust after 15-20min drive start this smoke 5-10 min and after stop again for few hours it's not smoke all time , and another think it's when I press on AC This smoke starts directly after press off AC the smoke stops  , I'm very confused because this smoke it's not all time but for a few minutes and after stopped any ideas what problem have in this lexus , thanks all the best 

[steve2006]

Hello and welcome to the LOC.

Given the notoriety of the Lexus diesel engines it could be a multitude of reasons but to begin with I would be looking first at the EGR valve which is prone to sticking due to carbon build up ( also given that his device only becomes operational once the engine has fully warmed up matching your symptoms).

There are plenty of DIY tutorials related to removing and cleaning the valve although new replacements are reasonably priced.

Another problem is the 5th injector involved in DPF regeneration which if faulty leads to over fuelling and white smoke. 

[Las Palmas]

14 hours ago, pellump said:

Hello how are you guys ,I need you help I have lexus is 220d years 2009 it's good car drive perfect nothing problem from the date I buy it but only problem it's the grey smoke come out from exhaust after 15-20min drive start this smoke 5-10 min and after stop again for few hours it's not smoke all time , and another think it's when I press on AC This smoke starts directly after press off AC the smoke stops  , I'm very confused because this smoke it's not all time but for a few minutes and after stopped any ideas what problem have in this lexus , thanks all the best 

Exhaust in a diesel must be really warm in order to be kept clean. Diesels are made for long hauls, not short tours. The engine in the 2.0tdi DSG Golf we had needed 5 - 10 minutes of high revolutions in order to pass emission test.

[steve2006]

Volkswagen and emissions.....don’t go there John 😀