high resistance coolant temperature sensor, is it overheating,air in coolant pipe at sensor, or bad sensor,
P0118 is an OBD II (on board diagnostic) generic code. It's explained as : P0118 - Engine Coolant Temperature Circuit, High Input.
Check here; http://www.obd-codes.com/p0118 It gives a very good explanation of how the system works, what symptoms you might encounter and how to fix it.
Trouble code P0200 means:Injector circuit malfunction
Trouble code P0172 means:System too rich (Bank 1)
Problem with the signal from the Crank Sensor.
Trouble code P0455 means: EVAP System Gross Leak (0.080") Detected
Trouble code P0342 means:Camshaft position circuit low input
Code 12 is just confirming that the computer is working. This code alone should always show when you test it.
Trouble code P0719 means: Brake Switch B Input Circuit Low
P1441 indicates a problem in the EVAP control system.
it means an emission trouble code is set in your engine computer,see your dealer asap.
do you mean cavalier hand brake?