Just had a CEL light with code 45...

I'm pretty sure it's the pressure exchange solenoid, and not the pressure sensor, as I can't get air to pass through the solenoid at all. I thought that the idea was to allow a path to the sensor from the outside air or from the manifold, depending on the voltage applied to the solenoid.

Can anyone confirm?

I'm going to try to clean this one up and see what I can make it do...

TIA

 

Panic over! It seems to be working now after a bath!

 

I can confirm that 45 is the pressure sensor / solenoid..

Looks like you solved it alreayd anyway

JGM

 

Thanks - the solenoid was gunged up totally, so it was a complete disassemble job! Took ages to find the escaped spring...

 

Well done..

JGM

 

Just found this post in a search and I have also got a code 45 any chance any one has a pic of what the part he cleaned looks like.

 

You mean this bit...



It's the brown one on the top. It can take a fair amount of cleaner sometimes - I don't suggest doing it the way I did

There's the green test connectors under the dash (See Chris Palmer's website) for making the solenoids click & the fans work to help you...

 

Thats great thanks for your help.

 

Cool......er.....

Have an MY94 Legacy Turbo....can't find the green connectors...just the black ones?


WHAT does this solenoid DO? Why would you need to "ventilate" the MAP sensor to atmosphere? Is it to calibrate it?

 

I assume the Leggy must have the green plugs too..

check where the back ones are there should be a yellow select monitor plug there too.. they are often taped back with blue tape on the impreza.

I have no idea about the map sensor..

JGM

 

turbosteve.. I believe thats why.

 

Hmm....ok.
Confusing.

Still cannot find the green wires. Suspect they don't exist. (Different ECU).