Re:Problem solved = "Check engine light" 1224 Code

["Daegrigg (Don)" <daegrigg@domain.elided>]

Ian,

Your were right.  The gray wire needed to be grounded for the O2 sensor to
work.  The Bosch instructions are misleading on this point.  Others using
this model (#15730) might have the same problem.  I reset the code and now
all is well.  Thanks a lot for your suggestion.

Don

----- Original Message -----
From: "Ian Lomax" <sfalfisto@domain.elided>
To: "Daegrigg (Don)" <daegrigg@domain.elided>; <alfa@domain.elided>
Sent: Tuesday, July 23, 2002 10:08 AM
Subject: RE: "Check engine light" 1224 Code


> Don,
>
> You don't mention what type of car it is, but It sounds like Bosch's
> instructions are wrong.  If it's a four wire sensor, you need to connect
the
> ground wire to a ground.  It should not ground through the body of the
> sensor.  Try that and see if the problem goes away.
>
> Good luck,
> Ian Lomax
> 71 Spider
> SF, CA
>
> -----Original Message-----
> From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided]On Behalf Of
> Daegrigg (Don)
> Sent: Monday, July 22, 2002 11:51 PM
> To: alfa@domain.elided
> Subject: "Check engine light" 1224 Code
>
>
> If it's not one thing it's ten others.   I am getting the check engine
light
> and the 1224 code which supposedly points to the O2 sensor.  But it is not
> all the time.  The check engine light appears after the car is warmed up
and
> a medium to heavy load applied as in accelerating onto the freeway.  It is
> consistent.  When the engine is shut down and restarted, the light goes
off
> and I can clear the code from the ECU.  Once load is applied as above, the
> cycle starts again!
>
> I thought the sensor was bad so I replaced it with a Bosch (4 wire).
> Connected black sensor to black and the two white (heater wires) to the
two
> whites in the harness.   Left the gray (ground) wire unattached per Bosch
> instructions.
>
> 'Recounting all this so some one might see something I have missed.
>
> Thanks,
>
> Don
>
> PS - Have read all the 02 posts in the old digest.
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