Got some error codes...

[Hedghog]

So today the SES light lighted up and it was immediatly noticed that the car missfired. It was manly with light load on the engine and at idle. When a little harder load it wasnt so noticable. After about 10 mins of driving, on my way home to plug in computer and check the error codes, it started to idle and run smooth and fine again. The SES light stayed on though.


This was the codes it shot:

P0158 - 02 Circuit high voltage (bank 2, sensor 2).
P0174 - system too lean (bank 2).
P0300 - random misfire detected.
P1154 - bank 2 fuel control shifted rich (FAOSC) (see P2099).

I had some problems with SES coming on last year and it was P0430 codes....

Somebody want to give me a hint on what to start checking?

[1998 T/A]

check the fuel pressure