I have a 2009 Accord. So far, I performed these three services:
A1
B1
A12

The computer currently says oil is at 50%, but it's been almost a year since the last oil change. I am planning to bring it for an oil change, but which exact service is due next?

 

How many miles have you put on your car since the oil was last changed?

 

4000 miles since last oil change.

 

With the exception of the oil, I believe the other service codes are mileage based. What is your current approximate odometer reading?

 

There are currently about 26,000 miles on the car.

 

Since you only have 4000 miles on the oil change, you should be good. I typically go by the mileage and not the age of the oil.

I think your owner's manual should have the service information. Does your cluster say something like A1 maintenance due?

 

Redbull-1 is correct, the codes are based on mileage and the amount of demand that is placed on your car that the computer calculates. If you barely drive the car the computer is aware of that and it can calculate when parts are apart to go out and need replaced. I drive my accord all of the time and I am very demanding of it, I hot rod it all of the time and I have or 80,000 miles on it and its only a 2007. I get codes all of the time, but my wife in her accord, she drives it nice and gently and hardly ever gets maintenance codes. What I have always done on my honda's is I always wait for it to say 30% oil life then I change it and take care of what codes it says when resetting the oil life indicator. What's great about the oil life indicator is that it is calculated by the computer to say you money on oil changes if you don't need new oil. If you drive the engine hard all of the time you will use more of the oil life and if you drive normal you use less of the oil life, and the computer displays what it thinks the oil life is to you so that you don't have to replace the oil every 3,000 or 5,000 or 7,000 miles, you just replace it at whatever percentage of oil life that you choose, I change mine when it says 30% verses every 5,000 miles.

 

Since you are at 26,000 miles, as you approach 30,000 miles, the engine air filter and the cabin pollen filter codes will come up next. If you live in dusty or dirty areas, you probably should change the filters every 15,000 miles even if there are no codes. Generally, the code to rotate the tires come on around every 10,000 miles. With or without codes, still good to check all fluid levels and car components when every now and then.

If you have an automatic, a lot of people change the transmission fluid every 30,000 miles, as Honda hasn't seem to be able to get their automatics right for some years now. People do this more as a precautionary preventive maintenance. The code for the transmission fluid is not scheduled to come on for quite some time.