LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2006 >> Accent Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0134 Ho2S Circuit No Activity Detected (Bank 1 / Sensor 1) >> DTC Detecting Condition
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0134 Ho2S Circuit No Activity Detected (Bank 1 / Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSE

Item Detecting Condition Possible Cause
DTC Strategy
  • Signal check, wiring interruption
  • Poor connection
  • Open or short in signal circuit
  • B1S1
  • ECM/PCM
General Enable Conditions
  • Dew point end detected
  • Required lambda = 1
  • Battery voltage > 10.7V
  • Exhaust gas temperature (model) ≤ 800°C (1472°F)
  • Heater control enabled
Case1 Enable Conditions
  • Time after fuel cut-off > 3.0s
  • B1S2 sensor voltage > 0.2V
Diagnostic Time
  • 0.1 sec
Threshold Value
  • Sensor Voltage > 0.2V
Case2 Threshold Value
  • Sensor voltage: 0.4 ~ 0.6V
Diagnostic Time
  • 5 sec
Case3 Enable Conditions
  • Exhaust gas temperature (model) > 600°C (1112°F)
Threshold Value
  • Internal resistance > 20 kΩ
MIL ON Condition
  • 2 driving cycle

* B1S1: upstream oxygen sensor / B1S2: downstream oxygen sensor

scientia non olet · About LEMON Manuals