What's causing my heater to blow cold air and temperature getting hot at an idle
What is your question?
I noticed yesterday my heater was blowing cool air instead of warm and noticed that when I would stop my temperature started getting up towards the half way mark and usually it barely goes above the C mark. I have also checked and the codes that came up were P0850 and P0700. Not sure which way to go about finding out what to do without having to take it to a shop because I don't really trust taking it to a shop without knowing what's going on with it
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Those concern the park neutral switch performance issue, nothing to do with the coolant temperature. Have the thermostat checked and engine cooling fan.
When the heater does not work and the engine runs hot, it is probably a sign that you are low on coolant. The best way to check radiator is when vehicle is cold, take the cap off radiator and look there. Sometimes the recovery tanks so not work and the fluid will not go back to radiator.
