OK, finally got my car up and running with OBD 0 to OBD 1 swap in my 91 sedan w/ JDM b18c but threw first a code 13 (atmospheric pressure sensor) and then a code 2 (O2 sensor). It has 4 wire O2 sensor but may have the black wires reversed, could that cause both? Car in friend's garage for the weekend so will check it out prolly tomorrow. I heard it is pretty rare for the PA sensor to go bad and the wiring to it is correct. Any thoughts?