Check engine on. Disconnected the battery. It did come back a day later.

I took the code from the socket under the dash.

One long repetitive blink. No short one apparently. Would this be 1 (oxygen sensor) or 10 (Intake air temperature)?

 

One long one would mean a 10...so for example long-long-short-short-short 13....and that was probably too much explanation, but you get the idea.

 

Where is located the IAT sensor? Can it be verified with an ohmmeter? Specs? Of course, I'll check the wiring first.

 

What year accord is that?

 

1999 EX-L 4 cyl. 75000 miles. I wonder if there is an easy way to check these sensors (IAT or OS). Dealer wants 57$ just to put their machine wired to my ECU.

 

The biggest thing dealers use to their advantage is people's stupidity, I guarantee anyone that wants to find out something about their car can find it on the internet or in a repair manual, granted sometimes its easier for a mechanic to fix it or they have the necessary room and tools. Give me a garage and some key tools I would have already have an h22 but anyway.......(had to vent) but I have no clue on a 99....lemme look it up

 

technicians have to buy thier own tools they are not "given" to them.
but anyway iat sensors are quite common to go bad on these cars! i replaced one on a 99 accord on monday at my dealership as a matter of fact. so give it a shot. but 57 dollars is alot just to scan it ...