Hey guys,

I've been having intermittent CELs, flashing on and off repeatedly for about 20 seconds and then clearing up. Nothing stored in the computer, it's even been on a PST2 and came up clean.

During the flashing CEL it feels like I'm a cylinder down. I had the plugs replaced and the CEL went away for a couple of weeks but i've seen it twice over the weekend.

Today I'm at a stop light and a permanent CEL shows up.
I slap the code reader on and see P1128.

According to renntech :

P1128 Oxygen sensing adaptation, idle range, bank 1

Is anyone able to translate that into non-mechanic speak for me ?
I caught the details at the time too via my code reader :

<?xml version="1.0"?>
<?xml-stylesheet type ="text/xsl" href="\Program Files\Common Files\AutoEnginuity\AutoEnginuity DTC Results 2.0 XML Template.xsl"
?>
<doc><SHOP_INFO>
<SHOP_NAME></SHOP_NAME>
<SHOP_ADDRESS></SHOP_ADDRESS>
<SHOP_PHONE></SHOP_PHONE>
<SHOP_FAX></SHOP_FAX>
<SHOP_EMAIL></SHOP_EMAIL>
<DATE_TIME><DATE_TIME>6/18/06 12:59:52</DATE_TIME></DATE_TIME>
</SHOP_INFO>
<VEHICLE_INFO>
<MAKE>Generic OBD-II</MAKE>
<MODEL>All Models</MODEL>
<YEAR>2000</YEAR>
<VIN>Not Reported</VIN>
</VEHICLE_INFO>
<TESTABILITY_ISSUES>
<TESTABILITY_ISSUE>None</TESTABILITY_ISSUE></TESTABILITY_ISSUES>
<MIL_STATUS>
<MIL_STATE>On</MIL_STATE></MIL_STATUS>
<DTC_RESULTS>
<DTC_NUMBER>P1128</DTC_NUMBER>
<DTC_DESCRIPTION>Undocumented trouble code description</DTC_DESCRIPTION>
</DTC_RESULTS>
<FF_INFO>
<FF_DTC>Freeze Frame (Frame 0) for DTC P1128 </FF_DTC>
<FF_SENSORS>
<FF_SENSOR_ONE>Calculated Load:</FF_SENSOR_ONE>
<FF_VALUE_ONE> 3 %</FF_VALUE_ONE>
<FF_SENSOR_TWO>Coolant Temperature:</FF_SENSOR_TWO>
<FF_VALUE_TWO> 208 F</FF_VALUE_TWO>
</FF_SENSORS>
<FF_SENSORS>
<FF_SENSOR_ONE>Engine RPM:</FF_SENSOR_ONE>
<FF_VALUE_ONE> 800 r/min</FF_VALUE_ONE>
<FF_SENSOR_TWO>Fuel System Status Bank One:</FF_SENSOR_TWO>
<FF_VALUE_TWO> Closed Loop</FF_VALUE_TWO>
</FF_SENSORS>
<FF_SENSORS>
<FF_SENSOR_ONE>Fuel System Status Bank Two:</FF_SENSOR_ONE>
<FF_VALUE_ONE> Closed Loop</FF_VALUE_ONE>
<FF_SENSOR_TWO>Long Term FT B1:</FF_SENSOR_TWO>
<FF_VALUE_TWO> 3.12 %</FF_VALUE_TWO>
</FF_SENSORS>
<FF_SENSORS>
<FF_SENSOR_ONE>Long Term FT B2:</FF_SENSOR_ONE>
<FF_VALUE_ONE> -1.56 %</FF_VALUE_ONE>
<FF_SENSOR_TWO>Short Term FT B1:</FF_SENSOR_TWO>
<FF_VALUE_TWO> 0.00 %</FF_VALUE_TWO>
</FF_SENSORS>
<FF_SENSORS>
<FF_SENSOR_ONE>Short Term FT B2:</FF_SENSOR_ONE>
<FF_VALUE_ONE> -2.34 %</FF_VALUE_ONE>
<FF_SENSOR_TWO>Vehicle Speed:</FF_SENSOR_TWO>
<FF_VALUE_TWO> 0 MPH</FF_VALUE_TWO>
</FF_SENSORS>
</FF_INFO>
</doc>


I switched the CEL off and it's been off all day. I did read that it can sometime be the fuel filler cap, I've checked that and it seems like it's OK. It's on about 1/4 of a tank of fuel and I have noticed that it cranks over longer when starting the lower the fuel is.

Any ideas folks ?