Like the title says I have a CEL and the code is a 13. The list refers to a BARO sensor.

The car is a 1999 Honda Civic Hatchback with a JDM SOHC 1.6 Z motor.

The BARO is built into the ECU of this model. But I have 2 ECU and they both give the same code 13. It was converted over from a A/T to a M/T that is the reason for having 2 ECU.

I am stumped and looking for ideas of things to check next. Obviously its not the ECU so what could it be. Could this be caused by a sensor? Which one(s)?

Any help would be great

Thanks