2000 Pontiac Sunfire- After returning home from an oil change today I now have a "red box with down arrow and wavy line". What should I do to fix this?
Low fluid possibly transmission if its red. Check the owners manual or Google.
Low coolant light, check you antifreeze level. Also be careful with it and do it when it's cool, I believe that one is pressurized.
Put coolant in your resovoir.
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