need help with p1093 pre cat fuel trim too rich bank 2

[THE VEIN]

2006 m54

i've been lucky to be problem free for a long time but now im getting this p1093 code that wont go away. the light came on randomly and would cycle on and off at different intervals. sometimes it can be on for 50 miles then off for about 5 miles then back on or it would be off for 30-40 miles then back on. so far the only thing i have done was clean out the idle control valve and clean the MAF and that hasnt helped me. i want to know what else is there to check in order of easiest/cheapest to hardest/most expensive

[ms328i]

Originally Posted by THE VEIN

2006 m54

i've been lucky to be problem free for a long time but now im getting this p1093 code that wont go away. the light came on randomly and would cycle on and off at different intervals. sometimes it can be on for 50 miles then off for about 5 miles then back on or it would be off for 30-40 miles then back on. so far the only thing i have done was clean out the idle control valve and clean the MAF and that hasnt helped me. i want to know what else is there to check in order of easiest/cheapest to hardest/most expensive

When was the last time you've changed the fuel filter? Same thing happened to my 04 X5, problem went away as soon as I replaced the fuel filter.

[bcredliner]

No engine miss or rough idle?

[upallnight]

I would check the DISA Valve.

[THE VEIN]

Originally Posted by ms328i

When was the last time you've changed the fuel filter? Same thing happened to my 04 X5, problem went away as soon as I replaced the fuel filter.

did that fuel pump and filter about 2 1/2 years ago

[THE VEIN]

Originally Posted by bcredliner

No engine miss or rough idle?

not that i notice. the car drives almost like normal except it seems a little sluggish when im trying to pass someone but i do notice that i have an exhaust leak somewhere but i think its something thats loose cause sometimes the exhaust is loud and sometimes its quiet

[THE VEIN]

Originally Posted by upallnight

I would check the DISA Valve.

i checked the disa when i cleaned out the ICV. when i took it off it smelled like straight gas. i checked the flap and made sure it was opening and closing under vacuum so im sure its good.

[upallnight]

What type of long term and short term readings do you have. If you have a rich condition, the system should be taking fuel away from the mixture.

[bcredliner]

If there is an exhaust leak pre-cats it can cause a fuel mixture issue.

[THE VEIN]

i found my exhaust leak right after the rear o2 sensor. the bolts rusted out and separated the section between the cat and center muffler