Intermittent stalling and erratic idle
 

1995 540iA. 236k well maintained miles. Only happens occasionally, and mostly when throttle is at idle, either at a stoplight or in park. Following codes popped up: lambda 1 lambda 2 and ac compressor.

Cleaned ICV and car ran better, not sluggish anymore....seemed to shift better...but still has stalling issues....o2sensors?

Any advice? She goes into the shop Friday.

Thx,

John

Without the actual codes I cant tell you for sure, but bad O2 sensors could cause this.

C9 and Cb if I remember correctly...and 41 (ac compressor). Odd since the a/c has been working flawlessly. I do get a kind of hum from the passenger side as well, not sure if it is realted.

Those arent OBD2 codes. How did you get those?

Peake codes. I have the diagnostic tool.