need F1 diagnosis

I pulled into my driveway, turned off motor. Then came back to car and it would not shift out of neutral with the F1 icon on the dash. I turned off the battery, turned it back on and everything works again.

Who do you recommend in SF Bay Area to diagnose F1 system on 2002 575M.

 

So I reread all the criteria posted that I could find on F1 operations
1. first time in morning open door and the pump operates for 11 secs. should be 10-20 secs
2 key on engine off. time between pumps was 4:30 min. should be greater than 2 minutes
3. key on engine running. time between pumps was 2:25. min should be greater than 1 min

everything checks out

any ideas?

 

that would be done using SD2 ? at a good mechanic. I do not have that tool

 

clutch position sensor replaced in 2018, F1 fluid flush at shop last December

 

took out for a 30 minute run and then transmission would not shift going 60, slowed down and it went to 3 then started home and then able to shift up again, got within 2 miles of home and tranny stuck in N, called for tow. Took over 2 hours for tow, and just before he got there everything back to normal. So something happens when fluid gets hot. Will be at shop tomorrow for diagnostics

 

The mechanic says the F1 is not keeping pressure as we thought. Likely accumulator and he suggests replacing pump as well while in there.

 

replaced F1 pump, acculumator and filter also replaced rollover valves. $7k

 

Terry

I was going to submit to BAT next week. We''ll see what happens.