I have purchased this car with ECM issues, or so it seems. i bought a used one based on the matching numbers and plugged it in. For some reason it wont start.
Any ideas??

 

sorry.. missing info - 2000 accord ex, at , 2dr.
The original ECM had o2 censor codes that would not clear. The shop said it was the ECM.

 

You have to get the ECM reprogrammed to match your transponder chips in the keys due to the Immobilizer.

 

Do you know whether your car is an ULEV or non-ULEV? Because, if it is an ULEV and the Air/Fuel Ratio sensor (primary) was replaced with a normal O2 sensor, the code will come back.

 

Does every 2000 and newer have the Immobilizer system?


Do you know whether your car is an ULEV or non-ULEV? Because, if it is an ULEV and the Air/Fuel Ratio sensor (primary) was replaced with a normal O2 sensor, the code will come back.[/I]

How do you know if it is ULEV or non-ULEV?

 

I'm not sure if it is mentioned in the manual. For my 05 accord hybrid, there is a "ULEV" sticker on the rear left passenger window. Maybe yours has one as well?

 

In the U.S., 1998 and up Accords have Immobilizer systems. This link has some info. regarding the Immobilizer for your car.

http://www.tegger.com/hondafaq/tsb/accord/x97-058e.pdf

As long as your engine has not been swapped or the valve cover swapped, it should says ULEV on the valve cover. There may be other stickers or tags in the engine compartment that says ULEV. Additionally, the OBD II trouble code that came up for the sensors can help differentiate whether it may be a ULEV or non-ULEV, as the trouble code for an Air/Fuel Ratio sensor (ULEV primary sensor) is different than for a normal O2 sensor (non-ULEV primary sensor).

 

Thanks for the help!