Re: Check Engine?

[Peter Schulz <schulz@iatcmail.ed.ray.com>]

Which is what I was wondering...

Do you have a "generic" Bosch O2 sensor with a spliced harness, 
or potentially a damaged harness?

It's easy to check either potential situation.


-Peter Schulz
1991 TQW
1990 CQ
schulz@res.ray.com



Tom Nestor wrote:
> 
> Jeff -
>     Did you get 2341 or 2342 ?
> 
> 2341
> Oxygen Sensor Control Limit exceeded,
> fuel pressure too low or too high, intake or exhaust leak, defective
> ignition system component,
> intake air leak after air mass sensor, O2 sensor is faulty
> Symptom: CO before catalyst is below 0.3% or greater than 1.0%,
> Extremely lean or overly rich exhaust, Spark Plug fouling,
> 
> 2342
> Oxygen Sensor
> Sensor Wiring or Sensor defective
> Heat resistor in sensor defective, Signal wiring shorted to ground, Fuel
> tank empty, Ignition system component failure, air leak at mass air flow
> sensor, air leak in exhaust pipe before catalyst, poor engine ground wire.
> Symptom: Emissions not within specifications
> 
> (codes and descriptions from Scott Mo)
> 
> Tom Nestor
> 
> >Tom:
> >
> >The blinking lights directed me to the O2 sensor only. The best of my
> >knowledge the electrical connections (including grounds) are in proper
> >condition.
> >
> >Jeff
> >
> >
> >>    The first thing I'd do is pull the codes after the event without
> >>shutting off the motor. Could be one of a dozen different things, but it's
> >>transient behavior leads me to suspect a marginal ground or connector
> >>somewhere. Let us know what you get for codes.
> >>
> >>Tom Nestor
> >>
> >>
> >>>I am looking for some collective wisdom on a recent annoyance that I am
> >>>having on the 91 200 TQ.  The check engine light is coming on
> sporadically
> >>>with no apparent rhyme or reason.
> >>>
> >>>I switched the O2 sensor and still have the same problem.  When the light
> >>>comes on it usually only stays on for 5 or so seconds then goes off.  I
> am
> >>>presently ignoring the problem but would like to fix it.  Any ideas??
> >>>
> >>>TIA
> >>>
> >>>Jeff Donnelly, Dragon wagon
> >>>
> >>
> >>
> >