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2011 Hyundai Elantra Touring Questions & Answers
Drop in gas milage with drop in altitude
I would guess your car was built to the Emission Standards
for your state,altitude etc
Still a big drop in mpg
If you ever moved, you may need your computer software
reflashed for lower elevation
I would guess the MAF Sensor was out of it's range
Check to see if any codes were stored
Need professional scanner
Look at freeze frame data unless you have been back for weeks
2009 hyundai elantra battery sometimes goes dead
I have the same problem. Usually I notice that somehow my trunk is open. Even if it is slightly open the light in there is on and the battery drains. I have also had it happen when there hasn't been anything on or open. I have to take it to the dealer at some point but for now I am replacing the battery because it is competely drained and I can't even get a jump to charge it. :(
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