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928 Error code TYP04-6

  • 1989
  • 928 S4
62 000

I have a issue that shows up after I drive my 1989, 928 S4 on a warm day (65 F +) , that after I shut off my car, a code flashes on my dash, TYP04-6, that will continue to flash until I reset (disconect the battery) and the car cools down. When the code appears , loose my fuel gage reading.  I have driven the car on cool days without the code ever showing, and driven on hot days were the code will not clear after 8 hours of the  battery disconected.  The car will run fine with the code showing, as it does not seem to affect performance.

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