How can i reset the emission code u0d00? - 2001 Hyundai Elantra

This code usually (not all the time) but usually occurs when there is a low voltage condition (dead or near dead battery). However, this code is also associated with communication with the transmission control module.

Here's a link to a forum that has the same code,they say their alternator is going bad,go to Autozone and have them test your alternator and battery,it's free. code u0d00 HELP Hyundai Forums Hyundai Forum Here's another link to change your alternator if it's bad. GET 35 GIFT CARD FOR EVERY 100 SPENT ON ONLINE SHIP TO HOME ORDERS

You might attract more interest if you add make and model and year to your question.

how do you know it's an 02sensor? and if you had it scan the scanner will tell you which one is bank1 its the bank of cylinder where piston #1 is ok

Go to this URL: http://www.hyundai-forums.com/138-trajet-forum/89493-trajet-error-code-u0d00.html

It appears that another Hyundai owner had the same problem and sorted it out himself. U0D00 seems to be the Mass Airflow meter (sensor). Replace it and see how it performs. Good luck.

i have mitsubishi lancer 2006 with code no 19 how can i fix by myself?

I had code u0d00 on my 2001 Santa Fe. Reseated gas cap, restarted SUV twice and check light cleared. May need to drive a bit to build pressure.

This code usually (not all the time) but usually occurs when there is a low voltage condition (dead or near dead battery). However, this code is also associated with communication with the transmission control module. You haven't described related to engine performance or drivability ... is there an engine performance or drivability issue?

MAF

Mass Air Flow Sensor or MAF - your car will sputter or shift funny.