Engine Management Light

[is200sam]

iv just noticed the engine managment light is on, the fault code is as follows:

P0420 CATYLYST SYSTEM EFFIENCY (BANK 1) BELOW THRESHOLD

iv had it cleared a few times but it keeps proping up, can anyway shed any light here please on how to get rid of it permanantly

[PHILLP]

Have you had it checked out by a machanic??

quickest thing to do if its running ok, remove the bulb :)

[Gord]

iv just noticed the engine managment light is on, the fault code is as follows:

P0420 CATYLYST SYSTEM EFFIENCY (BANK 1) BELOW THRESHOLD

iv had it cleared a few times but it keeps proping up, can anyway shed any light here please on how to get rid of it permanantly

You might needa new 02 sensor mate

[sparkystav]

Agreed with gord, one of the O2 sensors on the exhaust manifold.

Stav

[is200sam]

ok iv removed bulbs from dashboards before and had bad experience where the dials have dropped off lol.....how easy is it to take bulb out of engine management light on the IS? has anyone tried or done it before? the car runs perfect, its just that light thats doing my head in lol

[whiteman]

ok iv removed bulbs from dashboards before and had bad experience where the dials have dropped off lol.....how easy is it to take bulb out of engine management light on the IS? has anyone tried or done it before? the car runs perfect, its just that light thats doing my head in lol

you will find that the bulb is lit for a reason, if it is on there is a fault and needs fixing.

The Lexus is not like your renault or ford where you get bulbs coming on for the hell of it..

You have found the code so all you need to do is fix it. don't ignore it or take the bulb out as the fault will not go away it will get worse!!!!!!

[DJ Wozza]

quickest thing to do if its running ok, remove the bulb :)

Sorry but that advice is absurd. The ECL would then no longer work for a more important fault.

If he did as you suggest, are you going to pay for any expensive repairs that are needed in the

future if your advice gets followed ?

Get the part replaced (agree with Gord & Stav) and job done Sam.

BTW the ECL is on a printed circuit board. I would in no way play with it unless you want an even bigger bill.

[Gord]

Have you had it checked out by a machanic??

quickest thing to do if its running ok, remove the bulb :)

Its not running ok, thats why the lights on :P

[sparkystav]

If the fault goes away the light will go off after about 15 restarts.

But best to get it investigated.

Stav

[is200sam]

i think it might be the cat on its way out because i do smell some rich fumes out of the exhaust

[is200sam]

can i turn off the rear 02 sensors using an obII?

[Gord]

can i turn off the rear 02 sensors using an obII?

Turn off no, reset your ecu yes, the only way to get rid of the light is ...........sort the problem :D

[is200sam]

damn lol, im running 2 cars at the moment lifes getting hard with these b******ds putting tax up on everything! oh well iv still gotta keep on going eh........

[sparkystav]

02 sensors arent that expensive at all.

just search eBay.