Hyundai GENESIS COUPE BK 2010 Manual page 735

▶ Substitute with a known - good HO2S and check for proper operation. If the problem is
corrected, go to "Verification of Vehicle Repair" procedure.
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "DTC" button.
2. Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle
within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History(Not Present) fault" ?
▶ System performing to specification at this time. Clear the DTC.
▶ Go to the applicable troubleshooting procedure.
Fuel System > Engine Control System > P0133 O2 Sensor Circuit Slow Response (Bank 1 /
Sensor 1)
Component Location
General Description
In order to control emissions of the CO, HC and NOx components of the exhaust gas, heated oxygen sensor (HO2S),
mounted on the front side and rear side of catalytic converter, detects the oxygen content in the exhaust gas. The front
HO2S signal is used to control air/fuel ratio (closed loop fuel control) and the rear HO2S signal is used to monitor front
HO2S and catalyst for proper operation. The HO2S requires a minimum temperature to operate properly and provide a
closed loop fuel control system. The HO2S contains the heater element to reduce its warming-up time and ensure its
performance during all driving conditions. The oxygen sensor generates a voltage that indicates the difference between
the oxygen content of the exhaust stream and the oxygen content of ambient air. When the exhaust stream is "rich,"
there is more oxygen in the ambient air than in the exhaust stream, so the voltage will be higher.
There is a memory reset function on GDS that can erase optional parts automatically
detected and memorized by ECM. Before or after testing ECM on the vehicle, use this
function to reuse the ECM on the others