LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2019 >> Accent Limited >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0134-00: O2 Sensor Circuit No Activity Detected (Bank 1/ Sensor 1) >> Component Inspection >> Check HO2S (S1)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Check HO2S (S1)

  1. Substitute with a known - good HO2S (S1) and check for proper operation.
  2. Is the signal normal?

    YES 

    • Replace the HO2S (S1) with an usable one and check for proper operation. If the problem is corrected, replace the HO2S (S1) and then go to "Verification of Vehicle Repair ".

    NO 

    • Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector. Or, ECM memory was not cleared after repair. 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 ".
scientia non olet · About LEMON Manuals