Main task

The sensor is a combined pressure and temperature sensor. The sensor measures the current absolute pressure and temperature in the charge air pipe.

Temperature is used to:

• Together with boost pressure determine charge air density. Charge air density is used by airmass control to correct the throttle angle.
• Correct the charge air control valve's PWM ratio. At high temperatures, a higher PWM ratio is required to maintain the same airmass/combustion.
• Correct ignition angle. At low temperatures, earlier ignition is required.
• Blocking of certain diagnostics:
  • Blocks certain diagnostics at temperatures below -7°C.
  • Reactivates certain diagnostics at temperatures greater than +5°C.