Ls430 Passed Mot,,,but Engine Management Light Came On

[eekamaouse]

Hello,

My lovely LS430 (2001) passed the MOT - a relief...but then on starting the car, the engine management warning light came on. I asked the garage what could have caused this, as it was not on before the MOT test?

The owner asked me to come back for a diagnostic (free), which I did. The mechnic connected the kit, and after struggling a bit, pressed a few buttons, and the warning light disappeared. On returning home, and starting up the engine, guess what, the warning light reappeared.

I did go to Reading Lexus, and was told that just the diagnostic was £82. The car seems to run fine, but don't want to damage the engine.

Any thoughts on this?

[steve2006]

You need to obtain the diagnostic code(s) the garage which reset the warning light should be able to tell you this,once you have this we can help you.

Without having the code it wuld be pure guesswork as to the cause.

[eekamaouse]

Thanks Steve 2006 - will try to get this from the MOT garage.

I guess my loaded question is: can the emissions test cause a saturation of a sensor that tiggers the warninig signal? Just too coincidental for me, that there was no engine warning sign directly before the MOT.

Another thing I would value an opinion on is should I be driving the car too much? The MOT emissions data looked very good,