View Single Post
      05-09-2025, 03:48 AM   #1
bmehi
Registered
6
Rep
4
Posts

Drives: BMW E92 M3
Join Date: May 2025
Location: Ireland

iTrader: (0)

Starter replaced but still no crank no start

Hi everyone,

I’ve been having an issue that I figured was the starter motor and have replaced it but it changed nothing.

If anything it’s throwing up more codes now than it did before.

I had codes: A0B4 CAS engine start, starter operation
A0C1 CAS output, terminal 50
A0C2 CAS output, terminal 50 RS

Now I had these codes before I started, but since then I have 278D BSD message, alternator missing, 2B23 DME idle actuator governor monitoring bank 1, 2B15 DME throttle actuator governer monitoring bank 1, and 2B16 DME throttle actuator governer monitoring bank 2.

Definitely something electrical, had some work done a few months back and the guy said the engine ground strap was replaced. Also don’t mind so much that the starter was replaced as it looked fairly shoddy when it came out so peace of mind there for the future!

Could this be the CAS module has failed? Or something like the clutch switch?


When I go to start the car, all electrics come on no problem and I just have a ! Showing on the dash. It doesn’t click or attempt to crank at all. The fuel pump primes and if anything seems to prime for a long time.

Has anyone come across anything like this before? Are there any simple tests I can do to try figure it out? Could a bad battery still let the car lock/unlock and interior lights? I figure it’s not battery related as nothing flickers when I press start.

Any info or past experiences would be amazing!
Appreciate 0