The first O2 sensor is in the exhaust manifold. Open the hood and look down at the engine. The "HOT" plate is obstructing your view of the sensor. The second sensor is farther down the pipe, under the car.
Stocker @ RDTiburon.com
David @ votefordavid.blogspot.com
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
If the VSS is defective replace the instrument cluster. Only on 2001 and later Elantra's have speed sensor on transaxle
# 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
The P0713 code on a 1999 Hyundai Elantra indicates a problem with the transmission fluid temperature sensor circuit. This code typically signifies that the sensor is either malfunctioning or that there is an issue with the wiring or connectors associated with it. As a result, it can lead to improper shifting or transmission performance issues. It's advisable to inspect the sensor and its connections, and replace any faulty components to resolve the issue.
The location for the rear defogger relay on a 1999 Hyundai Elantra is located in the trunk or hatch area of the vehicle. The relay is labeled as M25.
1-3-4-2