code (p2098)-need help

[poppy400_0]

this code show up on my obd2, it read post catalyst fuel trim bank 2 system too lean. can anybody help me with this ALSO ho2 sensor not ready-02sensor not ready-second air not ready-evap sys not ready can any body explain this to me and what this mean thanks!

[lo_jack]

That could be a variety of things.

Start by replacing the post cat 02 and seeing if that clears the code (btw, that is an emissions control 02, not an engine fueling 02). Because you are only getting a post cat code, it seems the fueling sensors are working properly.

The evap system not working is probably related to this, because that recylces fuel vapors and perhaps injects them downstream for combustion later. I cannot remember how the evap system works in theses cars.

Anyhow, I would start by replacing the 02 it says is faulty and seeing if that clears at least the 02 sensor code. It could be indicating cat failure, or something further upstream related to fueling, since lean means not enough fuel is getting to that side, or it is just burning too hot.

[poppy400_0]

i already replaced the 02 sensor before this happen

[lo_jack]

Well if you are confident the sensors are operational then this could be one of three things:

a fueling issue
a situation where something else is getting into the cylinders (oil, like a seperator failure) and leaning that bank out
the emissions control/evap system has failed and that caused the lean reading.

I am not sure the last thing is true or possible, but hopefully someone with evap system experience can clarify that.

How many miles are on your car?

[poppy400_0]

90,000

[Zulu95]

Check the rubber boot going to the throttle body for leaks.