2021 Hyundai Accent LimitedFACTORY OEM SERVICE PROCEDURE

Component Inspection

  1. Visual Check
    1. Turn the ignition switch "OFF" & Disconnect HO2S (S2) connector.
    2. Check that HO2S (S2) is contaminated or damaged by foreign materials.
    3. Has a problem been found?

      YES 

      • Go to next step as below.

      NO 

      • Replace the HO2S (S2) with an usable one and check for proper operation. If the problem is corrected, replace the HO2S (S2) and then go to "VERIFICATION OF VEHICLE REPAIR ".
  2. Check HO2S (S2) performance
    1. Connect a GDS to DLC (Data Link Cable).
    2. Start the engine and warm it up to the normal operation temperature.
    3. Check the items related to an oxygen sensor on "Current Data" using the GDS.

      ■ Specification 

      G14079806Courtesy of HYUNDAI MOTOR AMERICA
    4. Is the result within specifications?

      YES 

      • Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR ".

      NO 

      • Replace the HO2S (S2) with an usable one and check for proper operation. If the problem is corrected, replace the HO2S (S2) and then go to "VERIFICATION OF VEHICLE REPAIR ".
Chapter Navigation
Return to Chapter: DTC P0136-00: O2 Sensor Circuit (Bank 1/Sensor 2)
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.