Have 96 chevy truck with obd2, 5.0ltr. Getting a reoccuring ses. Don't have scan tool, so took to autozone. Getting a PO175, bank2 system too rich. Replaced o2 sensor and prob went away about 1 week. Now it's back. replaced pass side o2 again and ses cleared for about 2 days. Any one have a clue whats causing this?
thanks, Kevin
kmdracer@yahoo.com

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by kmdracer:
<strong>Have 96 chevy truck with obd2, 5.0ltr. Getting a reoccuring ses. Don't have scan tool, so took to autozone. Getting a PO175, bank2 system too rich. Replaced o2 sensor and prob went away about 1 week. Now it's back. replaced pass side o2 again and ses cleared for about 2 days. Any one have a clue whats causing this?
thanks, Kevin
kmdracer@yahoo.com</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I wouldn't buy or replace another O2 until you can get some time in with a diagnostic scanner to see exactly what's going on. You're probably borderline on the excessively rich condition which is eventually latching the MIL. Need to have a look at your ltrim, O2, MAF, etc parameters to see what's going on.

 

Thanks, but right now I don't have access to scan tool/diagnostics. Just bought a laptop, should have a-tap next month. Probably take the truck to dealership, as no where else to go around here.(Small town)