I just finished doing a head gasket job on my 2000 Discovery II. It started right up, runs good and no leaks. I noticed a slightly rough idle. So I read the codes and came up with a P0174 system too lean bank 2. Could this be a bad 02 sensor. I did spray the cylinders with oil to prevent rust, maybe that fouled a sensor. I replaced the 2 front sensors about 80,000 miles ago, the rears could be original. The Maf has about 80,000 on it too.


Thank you,
Willie
2000 Discovery II
181,000 miles

 

no, not a bad oxygen sensor. Could be a maf sensor. if you have a code 0734 or 733 with it then yes its a maf sensor. But if you don't double check you tightened the intake and exhaust bolts down. seen a few of them get loose causing issues after a head job.