Hi,

I changed out my spark plugs on my 2020 2.7L.

Everything seemed to go great but unfortunately now my coolant temp is instantly maxed at start up (engine is cold) and I am getting a p1299 code, which is a cylinder head temperature sensor code.

I located the temp sensor and triple checked that all electrical connections are tight and secured. I did this all over the engine but especially for the wires going to the sensor. Everything looks good to me.

Anyone have any ideas? It would be a crazy coincidence if the sensor is actually in need of replacing. I am assuming I damaged a wire or something but everything looks fine to me.

Thanks in advance for any help. Much appreciated.

 

A new sender is dirt cheap.

https://www.rockauto.com/en/moreinfo...t=4748&jsn=909

 

Sounds like you banged up either the CHT or its connection.

 

Is it possible to test the incoming voltage with my multimeter? By this I mean sticking a probe into the connector to see if the sensor is even getting any power? Thanks