I have had intermittent problems with check engine light coming on in my 2005 Impreza Outback.  Usually fixed with a bottle of fuel injector cleaner, but this time the check engine light is on and the cruise control indicator flashes constantly.  Any suggestions?

You fixed your CEL with injector cleaner...? ok.

 

First step is to take the car somewhere with a code reader and figure out what code(s) are tripping the light to come on. Without doing this, it's anyone's guess what's causing the problem. It's probably p0420 or some other emissions related thing, but bring it to an auto parts store, garage, friend, etc with a code scanner is your first step.

Just a quick thought, check your brake lights, and clutch switch if its a manual. These will both prevent cruise from working. It may be as simple as a stuck switch. If not, then you need the codes read.

Just a quick thought, check your brake lights, and clutch switch if its a manual. These will both prevent cruise from working. It may be as simple as a stuck switch. If not, then you need the codes read.

 

It isn't that, the cruise light flashes when the CEL is on as a ploy to piss you off and actually fix the problem, rather than putting electrical tape over the CEL...

Thanks, all good advice!