If your vehicle is showing engine stalls, sputters, or shuts off when running hot, here are the most likely causes and the parts you'll need to fix each one.
These sensors contain internal wire windings that can become brittle and break over time. When the engine gets hot, the components expand, separating the broken wires and cutting the vital timing signal to the engine computer.
Ignition components are subjected to extreme under-hood temperatures. As they age, their internal insulation breaks down, causing them to short out or lose spark when hot, leading to sputtering and stalling.
A worn electric fuel pump can overheat and seize up after running for a while, especially if you frequently drive with a low fuel tank which normally cools the pump. Fuel pressure drops, starving the engine until the pump cools down.
If this sensor fails, it may tell the engine computer the engine is still freezing cold even when fully warmed up. The computer will dump excess fuel into the engine, flooding it and causing a rich-condition stall.
The EGR valve opens to reduce emissions when cruising, but must close at idle. If carbon buildup causes it to stick open when the engine is hot, it acts like a massive vacuum leak and stalls the engine when you come to a stop.
As the engine heats up, metal components expand. If an intake gasket is failing or was improperly torqued during recent work, this expansion can open a gap, letting unmetered air in and leaning out the engine until it stalls.
If the cooling system fails, the engine can physically overheat to the point where internal components bind or the head gasket blows. This causes a catastrophic loss of compression, shutting the engine down.