Ecu fault codes

Hi everyone

I have a 440 1.6 (B16F) with the fenix injection system.

I did have a fault code on the ecu. code 2-1-2 indication that the
lambda sond sensor was not working correctly. after spending a fortune
getting the lambda changed, i still have the same fault on the ecu.

So i wanna know how to clear the ecu and how to get the car running
properly.

please, does anyone know???

Regards

Vertuas

 

Hi....If the sensor was chaged by a specialist I'd take it back for
further work since the vehicle was not correctly repaired. If on the
other hand you self-diagnosed then you should be praised by people
such as myself, a professional auto technician, for you will help feed
the children for another day [at the rates we charge another month
would be more likely].

Sorry for the weak humor, but I'm an American raised in Sevenoaks,
Kent now living in Montana doing Volvo stuff.

You haven't provided a great deal of information regarding the
malfunction so I'm going to speculate somewhat. The lamp is on, the
car runs poorly, but the system functions at least in the limp home
mode and the diagnostics operate.

I'm presuming that you have limited access to diagnostic equipment but
you wll need a low impedance test light and the manufacturers repair
manual. Late model O2 sensors [our quaint phrase] are heated so you'll
have [usually] three or four wires. Cold engine, key on, engine off -
measure voltage at sensor leads, two should have voltage, one or two
should not. Check your ground leads for good contact especially those
in hidden areas...back of the head, under manifolds, etc. If you can
access an ohm meter check resistance in circuits from PCM to sensor
and PCM to ground.

These are basic checks you can do at home. Not to question your skill
or knowledge, but electronic systems on newer vehicles are
extraordinarily complex but often bullet-proof. If you cannot find an
obvious simple cure, i.e. bad ground, frayed wire, air leak,
corrosion, etc., then you are far better off taking it to a
specialist.

Good luck

Pat Hayes
Rivulet, Montana

 

Hi Pat

May car failed its MOT test (UK) due to extremely high carbon dioxide
emmision from the exhaust The car has been running fine and i have had no
problems with it

The car has a self diagnosis reader to the ecu, this is how i managed to get
the fault code from it.

I had the sensor changed by the professionals, as it was worth the extra 10
pounds to save me to agro of getting on the axle stands, lol

I did find a web page that gave instruction on how to clear the ecu, this i
did and took the car out for a run. I re-checked the ecu when i got back
and found if to be clear still.

I did find a different code of it after i did an 80 mile motorway run the
other day though, code 2-3-1. also something to do with the oxygen system,
not sure what though. clear ecu again anyways

i have driven 20miles to work and back and still no codes on it, so it must
be ok now.

thanks again for the post

regards

vertuas