DTC P0140: O2 Sensor Circuit No Activity Detected (Bank 1/Sensor 2): DTC Detecting Condition

2011 Hyundai Genesis 3.8SECTION DTC Detecting Condition
DTC P0139 DETECTING CONDITION TABLE

Item Detecting Condition Possible Cause
DTC Strategy
  • Monitor signal voltage
  • Poor connection
  • Open in harness
  • HO2S (B1/S2)
  • ECM
Enable Conditions
  • Battery voltage β‰₯ 10V
  • Engine running β‰₯ 60 sec
  • Engine warm-up state
  • No disable faults
Threshold value Case 1
  • 1.2V ≀ Voltage of HO2S ≀ 3.9V (at pumping current ON)
Case 2
  • 0.415V ≀ Voltage of HO2S ≀ 0.515V (at pumping current OFF)
Diagnosis Time
  • Continuous (more than 76.5 sec. failure for every 90 sec. test)
MIL On Condition
  • 2 Driving Cycles
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

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

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