PO494 Fault Code

[MDSR21]

2024 Equinox threw code PO494 while idling, waiting outside office building. Outside air temp was 60°. Warning on dash popped up: "Overheating. Return engine to idle." I shut off engine, went to a mtg. Coolant fan was running as I entered the building. Came out an hour later. Engine started right up, analog gage rose to a tad over 1/4 on the gage. The Warning message was gone, but the amber engine check engine light stayed illuminated. Drove 80 miles home and engine never went over 3/8 on analog temp gage. No more warnings displayed on instrument cluster. Anyone run into this? SUV has 11,000 miles on it.

 

[Moonwink]

The best way to start here is to have the car scanned. Only then can anyone advise what to do. Anything else will be a guess.

 

[MDSR21]

The best way to start here is to have the car scanned. Only then can anyone advise what to do. Anything else will be a guess.

Code PO494 comes up when scanned. Which is low fan speed. Which is why I asked if anyone has run into this.