Check the Signal waveform of HO2S

WARNING: This page is about a different variant/trim than selected.

IG "OFF" and connect HO2S connector.
Start Engine
With engine at operating temperature, monitor signal waveform of HO2S with GDS.

Courtesy of HYUNDAI MOTOR AMERICA
Is the sensor switching properly?
YES
- Go to "Check fuel filter" as follows.
NO
- Substitute with a known - good HO2S and check for proper operation. If the problem is corrected, go to "VERIFICATION OF VEHICLE REPAIR " procedure.