Sounds like the o2 sensor is in need of replacing. making motor run way
rich.
----- Original Message -----
From: <JAMEPC@aol.com>
To: <dakota-truck@dakota-truck.net>
Sent: Friday, July 19, 2002 5:26 PM
Subject: DML: Whats this code mean?
>
> I have an OBD I truck that pulls a 52. My scanner reads "Sustained rich
> mixture exceeds range of control". The Haynes manual says "Oxygen sensor
> stuck at rich position".
> So, is it that my o2 sensor is "stuck" and needs replacing? Or do I have
an
> overly rich condition that the properly functioning o2 sensor is catching
but
> can't correct?
> The o2 sensor voltage is fluctuating as it should be (jumping from lean to
> rich) which make me think it working properly. Maybe it's malfunctioning
> sporadically?
> Thanks for the help,
> James
>
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