Quote:
about 5 hours ago · #7
Okay...this morning I tried to start the engine, stumbled poorly then died...no start. Scratched my head...then pulled the MAF sensor plug from the air box, tried again and it cranked smoothly and idled like normal, very well. Now, running without the MAF plugged in, im showing code P114D lean after CAT, and P2195 and P2197. Have I isolated the problem to the MAF sensor?
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No, you have not. You are just taking stabs in the darkness due to your fear of spending money.
When you disconnect the MAF, the engine sees this and defualts to a super rick map (to protect the motor). Since you car is running lean (due to who knows what, mayb 150,000 mile o2 sensors....?) when you unplug the maf, it restores the AFR.
But sure, go ahead and replace the MAF...come back in a week with more head scratching.
(You may think Im just being a dick, but trying o get your attention....)
I do .ot nknow if it is your O2s, but the heater circut error tells me there is something up with the O2s. That is why my first question was when changed. When you came back with 'original 150k', its a no brainer to replace. (As pshovest suggests....replaicng the Os will also likely find any wiring issues.....oh, has anyone screwed with the O2 wiring? Hit anything?)
anyway.... buy bosch OEM sensors- not BMW...Bosch with the proper connectors. Cheap. Maintenance items