Catmulldp

Dear Steve DPNR Regeneration is a process that is automatically carried out by the engine ECU whenever it believe its necessary and this is done by injecting extra fuel via the main injectors and injecting fuel into no4 cyl. Exhaust port via the 5th injector and for most people the engine ECU is quite capable of regenerating the DPNR Cat, if you find that you are commuting at slow speeds without the opportunity for the engine to run at 1600-2000rpm for a prolonged period then the soot particle can accumulate to such an extent that P2002 is illuminated and car may default to limp home mode .In this instance it may be possible to carry out a forced regeneration (pm) and (s) firstly to heat the DPNR Cat up to between 400-500degrees c and then to attempt to reduce the sulphur contamination by heating the Cat up between 500-600 degrees c but eventually the noble metals become consumed and the abi litity of the DPNR Cat to regen reduces until even after forced regen the cat still blocks .Most manufactures consider the DPNR Cat a consumable component with life cycle of 6yrs or approx. 60miles . The Cost of cleaning/replacing EGR and DPNR Cats should be incorporated into any running cost calculations when comparing with the running costs of Petrol/Hybrid Cars. I am delighted that in your case Steve a Forced regeneration worked in this instance

Hi David I believe that this was a feature that Lexus were looking to explore but if fell foul of the data protection act and was not implemented. You will also find that Address by post code is not as fluent as rival systems only accepting part of the post code and then continuing with street name .