Just replaced my diverter valves and now I get a display saying "engine temperature too high"
The engine temp gage goes to the max/red area as well.

I disconnected the little hose connected to the bleed bypass valve, and a small amount of coolant...maybe a 1/4 cup at the most spilled.
Is it possible that this somehow caused an airlock somewhere in the system resulting in a high temp warning?

The car has been sitting in the garage for a few hours now and is cool to the touch.

Wondering if I bumped a wire or something? I was very careful during the work.
Advice appreciated.

 

Replacing the diverted valves won't cause your car to over heat. There's no coolant in it just air.
Not positive but most cars get there temp readings off either the rads or the thermostat housing. Neither are on top of the motor.
Not sure which it is on a turbo as myself or others never post about a temp sending unit failing.
How long have you owned the car? Is this the first erroneous temp reading you have seen? Over heated motors are a bad thing and would get very expensive very fast. So please be careful till it gets figured out just in cause it's not reading wrong.

 

The coolant temperature sensor is very close to the diverter valves. You should take a look at the connector. May be it was disturb... Location is just under the oil filter housing.

 

Thanks for the correction jp

 

You are welcome gearhead. Always happy to help if I can