My 2002 subaru outback
has 55,000 miles and several days a week starts spitting and sputtering for no apparent reason have tried different grades of gas and also have added dry gas. and at times will stall out. at one point check engine light came on. and scanner read code P-172 which means cylinder failure. Can you help?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
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
have you tried to pull the fuse from the alarm. is the alarm a factory or after market. if it is a after market alarm look under the dash on the drivers side there will be the wires to the alarm just pull the fuse. the other thing to do is disconnect the battery every nite
It could mean a number of different things... faulty maf or map sensor, throttle position sensor, fuel injector leak, etc.
Is there a check engine light on? I would be happy to further assist you if you were interested in diagnosing it yourself.
I do not know for sure if this is the problem you are having, But, I have noticed that from 95 up to 2002 I have seen a lot of PO420 codes that have been just the sensor. I do not know if it was a weak sensor or just that program telling it that it is below threshold. I did notice that if the vehicles are run for a long trip at highway speed it goes out. I wish you luck and have a great day.
any bad fuel in your area,low petrol recently,,may need to get dealer or good mechanic to pull fault codes from computer,not expensive to do,but repair depends on fault,need to look further,any car situation changes recently that may explain it,may be simple like spark plug lead
not sure if this will help, but I recently changed the engine in my subaru and changed battery + starter also. Would start but then not restart once warmed up. Turns out the engine ground got forgotten, had that hooked back up after banging my head on a wall for a week and it runs like new
PO420 is for catalyst system efficiency below threshold. I have seen this many times on vehicles from 96 up. It is due to the system not burning the fuel at what it considers an acceptable rate. Todays fuels are not the best we could have for internal combustion and sometimes it will set off the light. I tell my wife she is too easy on the car and it's not burning the fuel proper. After a couple days it goes out. It will not harm your engine and should go out again. Fuel system cleaning additive will also turn of light. Good luck and enjoy your Subbie. Greatest car ever Built.