Code P1299

Hello,

This indicates the engine has overheated. So first question is the radiator full? You are hearing the water under the dash because that is where the heater core is and there is probably air in the system which tells me that the radiator is low which can be because of a blown head gasket.

Here are guides to help us see whats going on.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

and

https://www.2carpros.com/articles/car-is-leaking-coolant

Please let us know what you find. We are interested to see what it is.

Cheers, Ken