Re: Check Engine?

["Tom Nestor" <tnestor@cyberportal.net>]

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
>>>
>>
>>
>