If your 2001 Chevy Malibu's check engine light is on and the temperature gauge is not functioning, it could indicate a problem with the engine coolant temperature sensor or the gauge itself. Additionally, the check engine light may signal a variety of issues, from minor to serious. It's advisable to use an OBD-II scanner to retrieve any diagnostic trouble codes, which can help pinpoint the problem. Once you have that information, consider consulting a mechanic for a thorough diagnosis and repair.
Check your fluid levels.
check power to fans,if power check fan sensor!!
Fix the problem causing them to be on.
There is an engine misfire, probably spark plugs issue.
There should be a dipstick like the one for oil. Check with engine running.
Get the computer scanned to see what the problem is.
(torque converter clutch circuit performance or stuck on)
Check your coil pack or the spark plugs.
Disconnect the negative battery terminal for at least 30 seconds.
this is for safety so engine does not get ruined,check oil level!!
how do you check the safety neutral switch on a 2003 Chevy Malibu
If the check engine light is illuminated, start with scanning for codes.