1993 300TE LED codes
 

I have a 1993 300 TE base (not 4 Matic) wagon. It has the built in LED code reader. The check engine light came on a couple days ago. The LED flashes 8 times. I have the Bosch pdf manual but I am unsure as to which of the code pages to read since they differ depending upon a number of factors, some of which I cannot figure out.

What does 8 flashes on the LED mean?

THANKS

Defective engine coolant temp sensor.

Thanks much. I'll order one. Sounds better than my other "guess" which was ISC. Sorry I couldn't figure out the manual - the guidance of a pro is much appreciated.

Bill