any E46 Guru's out there?

[blingsta]

Need help with my new motor guys! Engine management light stays on after replacing all 4 o2 sensors???????

its E46 325 ci

[stuartgallafant]

who told you to replace all the lambda sensors? were the fault memories cleared?

[blingsta]

well ive noticed that all the sensors look brand new, the fault codes were cleared and the light still came up??

[Steve-E30]

Does it have a egr valve ??
Clean it out , Usually brings the same codes up if i remember correctly

[blingsta]

yep your right matey, they do bring up the same codes. but the E46's dont have em !

[stuartgallafant]

the EML light and the Engine Management Light will illuminate for any reason, when the DME detects something running out of a set parameter

This could be, for instance, the MAF detects X amount of entering the engine, the Pre-Cat Lambda detects Y amount of burnt mix leaving, and the Post-Cat Lambda should expect to see Z amount of mix. If these dont match within a tolerance, the light will be brought as a fault will be logged

When the light is illuminated, the DME runs off of a preset value, which is completely safe, so as not to destroy the engine and to get you to dealers safely

You could have an air leak, a cam sensor gone down, an underactive injector, wrong fuel pressure, blocked cat... the list goes on

Take it to a dealers and ask them to quick test it. Should only cost about £10

[blingsta]

^^^ Cheers fella, good points raised... the funny thing is, after having cleared the same a code a few times, its now stayed off for a few days??? problem hopefully sorted!..

[stuartgallafant]

can you remember what the code is?