1998 mitsubishi diamante o2 sensor, o2 heater, EGR sys NOT READY

SOURCE: Mitsubishi Diamante 1995

Alldata diy is the way to go.  However, I can tell you.  Remove the intake plenum stay. then the roll stopper bar.  Unbolt alternator and then fish it thru to the passenger side.  ( you may need to remove some hoses, etc.  It WILL work,  I just did mine.  Chiltons says remove from under car, No way.  It must go thru to the passenger side.

SOURCE: o2 sensor 1996 volvo fail emission test

If you have trouble codes stored in your cars computer for O2 sensors a fuse will not fix it. One or all of the O2's may need to be replaced. There are test that can be done to confirm which one.

SOURCE: Air conditioning - Mitsubishi diamante sei 1998

Yes. A Recharge on the System will Fix this Issue. Please Rate My Response! Thanks!

SOURCE: 1996 doge intrepid wont pass emission test because IM monitors ar

Just maybe your O2 sensors are not operating properly. They may be requiring your engine to heat them up to get upper temperature readings but not lower. You can easily diagnose these and all other sensors and problems by purchasing a Hains manual at your local Auto Zone or Advance auto store which will greatly aide you in diagnosing all your auto needs. And the fault symptom index at the beginning of the book will ease your troubles with professional one on one advice with step by step instructions. Its like having your own ASE certified mechanic at your finger tips. Good luck.

SOURCE: Will not pass inpection, 5 sensors not ready--V6 3.0

Drive the car for 2 miles non-stop and take it to smog inspection WITH OUT TURNING OFF THE CAR!! the key is that the car goes threw the test while the engine is running ...

if the car is turned off ... u will have to repeat procedure ...