I have a 1990 accord ex and the ecu flashes 2 times .Some places say vss ,but some places say code 17 is vss and code 2 is 02 sensor.Speedo works so does cc .thanks for the help you have already given me on s light flashing 9 times replaced nc speed sensor light went off.One down one to go. thanks Dan

 

If it flashes two times, then the code is either two, eleven, or twenty. In the 91 manual that is in the DIY thread, there is only a code 11 (IMA sensor).

It has to be on the intake. If you download that 91 accord manual in our online manuals thread in the DIY forum, the page is 6-180. It has to be on the intake manifold.

 

thanks I will recheck code just to make sure then I will test the Ima sensor.I will let you know.
Dan