1985 Porsche 928 AutomaticFACTORY OEM SERVICE PROCEDURE

Temperature Sensor II (Engine)

Temperature sensor II, installed in the coolant circuit, measures the instantaneous engine operating temperature and advances ignition timing when the engine is cold and in partial throttle, which guarantees good engine speed pick-up. One of the 2 resistors controls mixture enrichment and the other ignition timing.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.