Reading trouble codes...

[hiclimber 10]

Hello,first post. Longtime Subaru owner.

 

How do I read the trouble codes on my 01 Forester? My 94 Loyale has a little red flashing light under the dash which I use (in conjunction with the shop manual) to decipher the code.

 

Is there an after-market device that I could use. I'm getting the CEL code for catalytic low efficiency (very intermittent) and want to monitor the codes to ensure something else doesn't trigger the light.

 

Thanks