I replaced my power steering pump in my 2006 WRX but it's playing up for some reason.

The power steering reservoir is boiling when the car is on, and the steering wheel is incredibly hard to move unless the accelerator is pressed even on idle. The power steering pump seems to work when the accelerator is pressed but it will whine very loud.

On idle when you move the steering wheel it won't whine. The check engine light came on as well

I've flushed the old power steering fluid and added some ATF

Any ideas?


  • Arte you sure the fluid is boiling? Is it that hot? It may just be air bubbles - have you bled the system? My car needs to have the wheels turned lock to lock a few times to get all the air out of the pipes and into the reservoir. Then you check the fluid level again.
    – Solar Mike
    Jul 20, 2017 at 8:12
  • @SolarMike Hey Mike, thanks for the response. I'm not sure if it's hot but if the reservoir cover isn't on it would start going all over the engine bay. I've spent the past 30 minutes to an hour turning the wheel back and forth and it's still not working. I've removed the old power steering fluid from the reservoir and topped it up with ATF.
    – Adam
    Jul 20, 2017 at 8:16
  • 3
    You're sucking air into the system somewhere. Check the connections where you had to interrupt the fluid flow to replace the pump. You'll find a leak drawing air there some place If there was a leak on the high pressure side, you'd be seeing power steering fluid being sprayed all over the place. Jul 20, 2017 at 10:53
  • @Pᴀᴜʟsᴛᴇʀ2 Thanks for the reply, I'll have a look tomorrow. What would cause the check engine light to turn on though?
    – Adam
    Jul 20, 2017 at 11:58
  • If the light is on, there should be a code. Find out what it is.
    – rpmerf
    Jul 20, 2017 at 12:39


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