Warning light, engine electronics.

[Explorer-Gurra]

Dear Forum!

When I started my 99 Explorer this saturday the "little yellow engine"-symbol (engine electronics warning) showed up and it stayed illuminated.
The engine runs smoothly as ever. Maybe the idle was a bit uneven at a few times, but generally everything worked a normal.

The symbol is still there today. And engine function seems to be normal.

What's this? Any suggestions?

We had some rough nights with temperatures of -20 centigrade (-4 F) but on saturday it was warmer, maybe -8 centigrade (17,6 F).
Can the cold have caused some problems?

Best regards
Gurra
Uppsala
Sweden

 

[ExplorerDMB]

It is the "Service Engine Soon" light.

The red Check Engine Light demands that you get to a shop quickly. The yellow light means theres a problem, but you don't have to rush to the shop - just need to make an appointment soon. You will probably see a drop in fuel mileage - usually the computer is in Limp Mode when this light is on.

Get it scanned to see what codes are in it

-Drew

 

[Bigg_billy]

Yes go to AutoZone and have the code read for free. If the engine is still running good, it could be a leaky intake manifold gasket like mine, not bad to fix P0171 and P0174 I suspect... usually turns up in the colder months.

Bill