SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2.7L) (1 OF 2)DTC TROUBLESHOOTING PROCEDURESDTC P0159: HO2S CIRCUIT SLOW RESPONSE (BANK 2/SENSOR 2)DTC DETECTING CONDITION
2005 Hyundai Santa Fe GLS, 2.7 D, AWD

DTC P0159: Ho2S Circuit Slow Response (Bank 2/Sensor 2): DTC Detecting Condition

2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION DTC Detecting Condition
DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • Slow response (Switching time check at entry in Fuel cut off)
  • Leak in intake or exhaust system
  • Faulty fuel system.
  • Front and rear HO2S connections reversed.
  • Contact resistance in connectors
  • HO2S contamination
Enable Conditions
  • Fuel cut-off phase
  • Sensor preheating and full phase finished
  • Catalyst temp. model < 350°C (662°F)
  • Coolant temp < 70°C (158°F)
Threshold Value
  • Average ratio (between measured and maximum allowed switching time at entry in fuel cut-off) < 1
Diagnostic Time
  • 5 fuel cut-off phases
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.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.