The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter
I believe it is a input speed sensor. Hyundai calls them pulse generators on the 99 elantra.
how to replace the starter for a 1999 Hyundai elantra
If the VSS is defective replace the instrument cluster.
how to time a 1999 Hyundai elantr glsAnswerhow to set timing belt on Hyundai elantra gls figure
# Unplug the IAT sensor electrical conector # To remove the IAT sensor from the air cleaner housing simply pry it out of the rubber grommet
Trouble code P0136 means: O2 Circuit (Bank 1, Sensor 2)
Front right side
1-3-4-2
The carbon canister in the 99 Elantra is in a plastic case mounted to the frame just behind the driver's side rear tire. There are fuel vent line entering it and there is also an electric line that connects to an emission sensor.
In the Hyundai world bank one is always the firewall side, also called "right" side.
You can probably find that out from your VIN number.
Its going to be under the dash beside the gas pedal