Saturn 2000 sl problems please help

Died on freeway and would not restart ? When you turned the key what happened ? Did the starter engage and spin the engine ? Or nothing happened . Why did you charge the battery ? Did you drain it trying to start it or it drained when driving the vehicle an it killed it ? Before replacing parts did you have it diagnosed or did you just replace parts ?
048 Engine Hard to Start or No Start Scan Data for Starting Problems If you don't know how to test ,your best bet find someone like this .

that is just a basic 10,000 km service
check engine light on
undo battery terminals count ten reconnect
clears the codes
if check engine light returns
the code will be stored in the ecu

description sounds like an 02 sensor

You need to have the fault codes read with a OBD2 code reader or scanner, that is how you find out what system in the computer controlled engine is acting up.

Your owners manual will tell you that the anti-theft can be turned off, but doesn't tell you how (dealer only?). If it is turning over but wont start, (trying to hit and outside temp is below 32) check the coolant temp sensor. Saturns notorious for cracked sensor sending false info to computer thus flooding engine.

THE NEXT STEP IS ,( WHEN IT DOES NOT START), CHECK TO SEE IF IT IS : NO-SPARK, OR NO-FUEL CONDITION THIS WILL LEAD YOU TO THE NEXT STEP. YOU MUST HAVE THREE THINGS TO RUN. SPARK, FUEL & COMPRESSION. HOPE THIS HELPS MOTOR62500..

sounds like it could have ignition module failing,also possibly coil starting to go.I seen same problem on 92 hatchback,put module and coil on and runs fine.goodluck...

you have a vacuum leak

check the positive battery cable for corrosion. also make sure the cables are tight

THE STARTER IS GOING BAD

if this a fuel injected car just check to fuel pressure first.