Hello there,"question the po132 code showed changed the o2 sensor code did not stay off for long.Last night the engine light started to flash.I stopped right away.Cheched the oil was low 1 quart after 1 week oil change plus moisture in cap i noticed?After restarting the engine light stopped flashing went solid.When home checked now both these codes showing.Not sure where to start?Any input would be very much appreciated.The o2 sensor that i changed was 1/1 circuit high.The po 300 code clears but returns as soon as warm.

 

What brand O2 sensor did you install?

 

Hangzong something?I got a new Bosh one see if that changes anything.Could 02 sensor have something to do with the 300 random misfire as well ?Thanks

 

You want denso, or ntk sensors ONLY. These trucks don't play nice with the other brands.

If the sensors are feeding the PCM bad info, then yeah, misfires are a real possibility.

 

Did you install it yourself ? because if this is made in a shop that's a disaster

 

Agreed, but usually these thing seem to (hopefully) sort themselves out.
Any shop trying to succeed is not going to make the same mistake twice...