2003 expy 4x4 5.4 "overheating"

[Bedrck47]

P1299 - Cylinder Head Over Temperature Protection Active

Indicates an engine overheat condition was detected by the cylinder head temperature (CHT) sensor. An FMEM Strategy called Fail-safe Cooling was activated to cool the engine.

Engine cooling system concerns
Low engine coolant level
Base engine concerns

 

[Bedrck47]

let the engine sit overnight check your gauge in the morning to see where the needle sits.

you may want to start checking the wiring

 

[Bedrck47]

Just a word of advice I notice that you have asked the same questions in three different threads

being you started this thread, you would be best to keep posting here.
The same people will read this thread and answer here.
It will save you from jumping around and adding to the confusion

 

[wcm7823]

ok thanks

 

[IMINYOURCHAIR]

I don't really read over here in the 2nd gen forum or the third gen either but in the other thread where I replied to you go ahead and follow that and then reply here so we can keep the discussion here.

I cant look up any prints like roxxy can as my copy only goes from '96 to '99.. but I do still stick to the next step being to check your wires back to where that sensor is sending it's data...