Code 45 Atmospheric pressure sensor ??

[aesalinas45]

1991 Legacy Wagon L. Does anyone know where this sensor is on a non turbo?

[nipper]

Thats the MAP sensor. It uses a flip/flop valve to change between atmosphere and manifold pressure. It should be (cant find my book) on the right front strut tower under the hood. At least thats how it is on the OBDII cars.

Hope that helps