05 outback p2009 code and cruise control light flashing

Plug in the Intake valve control solenoid.
The plug may have been overlooked or has been damaged.

you have a code set in one of the computers that needs to be checked to know what has to be done to fix.

I found this under Fixya; 2006 Subaru Outback; there were 25 answers: The problem is not with an emission issue as you would expect with a check engine light. The ER 55 code on the odometer means that there is a loss of communication with the ECU, that is why the check engine light is on and cruise light flashing. for what ever reason whenever your check engine light comes on the cruise becomes disabled. Lame I know. I work in the service department and have seen this issue a lot. The only real way to fix this issue is to go the dealer and have them do a reflash for your vehicle. If the ECU is bad it is covered under the federal emmission wrty for 8 years or 80,000 miles

The clue is the Check Engine Light (CEL). Get the ECU read for the error code(s). The Cruise light turns on when the ECU detect any error.

It may be as simple as a gas cap that is not tight enough.

It is flashing a code need to take to a shop and have them put on computer to find out code and replace part.

As far as the cruise control light flashing, the light is flashing to tell you that the cruise has been disabled. The vehicle's computer will disable the cruise control from working when certain trouble codes are set in the PCM (main computer), which the computer thinks may cause harm with the cruise engaged.
The check engine light may not be connected to the deer hit. I have seen many times when something like this is a coincidence. That being said, the jarring from the deer hit may have caused a vacuum leak. Or perhaps there is more damage than you might think under the hood.

P0420 Usually indicates a bad catalytic converter or a bad oxygen sensor. Since you car is 2008 my money is on the oxygen sensor. Or it could be something as simple as an exhaust leak. The cruise control will keep flashing until you get the CEL fixed

CHECK TO SEE IF BRAKE LIGHT WORKING.BECAUSE BRAKE LIGHT SWITCH DEACTIVATE CRUISE CONTROL WHEN BRAKES APPLIED.MOST TIME IF YOU HAVE CRUISE CONTROL PROBLEMS FAULTY BRAKE LIGHT WILL CAUSE CRUISE CONTROL PROBLEMS.

55 EGR Temperature Sensor or Circuit

ABS light is nothing to do with code 55 separate fault circuits.

Under dash there are two wires with mini spades at the end, connect one of them to the single black multiplug in position 2. Thats RHS plug inlet when you hold plug with tab lock on top.
ABS sensor should then flash up error coded. Ignore code 11 thats a initial flash to let you nknow the difference between a fast and slow flash.

Let me know what code flashes up and I will tell you the symptom,

Dan

I have had the same problem but not from the oil change but a dodgy batch of fuel, try filling up with some good quality Premium fuel and the light should go out and the cruise light will stop flashing