2000 Chevy Tracker stalls or cuts off after running for a while...maybe gets too hot. Will restart after 10-15 minutes. If car idles in traffic or thru drive-thru service or if A/C is running the car seems to cut off sooner. Any idea of the problem? I'm told the sensor was checked, but how do I know?

It could be a clogged catalytic converter or bad o2 sensor. go to autozone and have them scan it ( for free) and post what codes and probable fixes they give you (they'll give you a print out)

I would change the fuel filter before anything else, however, a fuel filter would cause it to cut off no matter how fast you are driving.

Not sure why you are thinking camshaft position... I am thinking maybe a relay is giving up. Did you check for fuel pressure and spark after the stall?

At idling speed an engine does build up a lot of heat and the cooling fan will kick in. In slow moving traffic or traffic jams the temperature gauge can touch the red - particularly on hot days. The reason it cools down when you start moving is because of the air flow through the radiator.

Presumably there are no leaks from the cooling system otherwise you would have mentioned it. In normal circumstances the fan will not be running as you are driving at speed, as the air-flow through the radiator is sufficient to cool things. The fan only kicks in to get rid of excess heat - and this usually occurs at idling speed or after you have parked the car.

If the fan is running all the time as you drive, this points to either a fault in the fan switch, or the car is running too hot. presumably in normal driving the fan isn't running and the temperature gauge reads normal?

It is common - in stationary traffic many cars overheat (particularly big engined models) try to stall and 'cut out'. Restarting can be difficult until the engine cools down.

Is your car overheating in normal driving conditions or just at idle speed? Overheating in normal driving conditions can be caused by things like a failing water pump, blocked radiator, collapsed hose, faulty thermostat or, in the worst case scenario, cylinder head problems.

Overheating at idling speed is 'common'. Check your coolant level. If your car isn't using/losing coolant then there probably is no major problem. You can flush out the cooling system and refill with new coolant - and also check your radiator. Are the cooling fins crumbling with age? Or maybe they're partly clogged with insects and debris from the road? A blast with a hosepipe wil sort that out ..

The question is how much does your car overheat in normal driving? If it doesn't .. it appears as though you have nothing to worry about as such. Most cars have 2 speed fans... the 2nd faster stage kicks in at some point dependant on engine temperature. Perfectly normal.

it's the cps (crankshaft position sensor)
it cuts off the power to the fuel pump as a preventive mesure, it's a very common problems with the catera
i had the same problem with my 2000 model

a bad crank sensor, or cam sensor will cause this--no start, hard time starting, shut off while driving. these will set a fault code. have engine scanned. auto zone will do this for free. p0340 is a bad cam sensor,

Try running some fuel treatment in your fuel tank, if that doesnt help, try checking your spark plugs, It might be time to change them.
Good luck

Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Fuel pump? That is odd, it seems there is no issue with getting fuel. I would check the idle and the choke settings. Try tweaking those a bit.

Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.