"2 O2 Sensor "B" (O2) Open or Short in O2 sensor circuit, bad O2 sensor Cat. Converter"
Code 2 means the secondary 02 sensor. If you have one, its bad or disconnected. If you don't, you have the wrong ECU.

"6 Coolant Temperature (TA) Loose or dirty connection, Short or open in circuit, Bad sensor - More Head, under distributor "
Code 6 is the Engine Coolant Temperature Sensor. This is often forgotten and left unplugged, it is on the distributor side of the engine screwed into the block, below the head.