96 Honda Civic trouble codes

[towerman]

My 96 Honda Civic starts right up but as soon as it warms up the engine starts to rev up 500 rpm and down 500 rpm. If I turn the a/c on the engine instantly smooths out.The DTC codes I received are
1. p0118 (engine coolant temp circuit high input)
2. p0113 (IAT sensor 1 circuit high input)
3. p0135 ( 02 sensor heater circuit malfuntion bank 1 sensor 1)
Other than this, the car runs fine. Any help would be appreciated to get the check engine light cleared. I know where the 02 sensor is but cannot find the other 2 items reporting as bad.

Thanks in advance

[RonJ]

What engine type do you have (e.g., DY16Y5, 7, or 8)? Does the attached picture help?