Update – here’s the troubleshooting steps I did:

1. Pulled the sensor out of the well but still attached to the harness: message remained.

2. Condition #1 above, then put a magnet on the sensor: message went away.

3. Removed sensor from harness: message remained.

4. Inserted jumper wire into harness socket: message went away.

Based on this, somehow my system seems to be in a mode where it is operating backward. In other words, normally as the float dropped due to a coolant loss, the magnet would come down to the vicinity of the sensor; the switch would close and the message would appear.

I have the opposite – when a magnet is near, the switch closes and the system is happy – message goes away.

How on earth did the system get so jacked from just a simple tank and sensor replacement and why can’t I clear this message via some standard procedure?

Hopefully someone can shed some light, else I will just make the jumper wire permanent and avoid this headache. I check fluids often and I still have the temp gauge so I’m not too worried, but I hate to kludge things. Advice, comments very welcome! Thank you.

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2006 X5 4.8is
LeMans Blue over black
Style 168 rims
Blackout grills and hood vents
Aux jack