I have a 2008 Corolla with almost 200k miles and my check engine light has been coming on and off for months. I got the car over two years ago and I have put on about 40k on it. I cant really say how the previous owners treated it because it was bought at an auction.I have noticed symptoms like bad gas mileage, loss of power and a hesitation when hitting the gasI have changed my O2 sensor, cleaned my MAF sensor, pour sea foam in my gas tank and had my throttle body cleaned. I dont know what to do because the light keeps coming back and its two of the same codes. Could it be something as simple as needing a full fuel system cleaning?
No codes, no answer. Run along.
Yes I agree with what has been said
From now on clean your own throttle body its very easy you just release two clamps and spray some cleaner down into the throttle body until its clean. Your air filter can cause all your problems, it you have had the air filter replaced take it back out and see if anything is stuck somewhere blocking the air intake. You can change the fuel filter which is very easy on most cars. It is either under your car close to the gas tank, in your gas tank or under your hood. Just remember to take the gas cap off before you change your gas filter because if you don't when you take the hose off one side of the gas filter gas will go everywhere because it is under pressure unless you take the gas cap off. You should also run the highest octane gas because it will help clean out your system. You can also go to an auto parts store and get injector cleaner or engine cleaner they have them all. Have you changed your spark plug or the spark plug wires or coils. Those would also cause your problems You can find out how to do all of these things on the internet. I went to a VW dealer 4 years ago and told him my car acted like yours and he told me that I would have to pay over $1600 for them to replace everything so I bought everything at auto zone which cost $195 and replaced it all with the help of the internet and saved lots of money. If you can find a very dirty mechanic at a small shop you might ask him what he thinks. The reason for the dirty mechanic because he is repairing cars which makes him very dirty, he is not like the dealership tech who replace parts instead of repairing them. Good Luck
No. You won't get a code for a fuel system that needs cleaned. You fix the problem(s) that is triggering the codes, and the problems (they are symptoms BTW) will disappear. Edit: And no, running higher octane gas will NOT clean your system, in fact you could very well run worse. If you people don't get that, the information is out there, educate yourselves. I could care less if you waste your own money, don't waste others money.
