Geely EC718 2009 Workshop Manual page 251

Engine
Yes
Start the engine and turn on the scan tool.
Step 2
Next
Keep the engine speed at 2,500 rpm for more than 2 min to warm up the engine, until the engine coolant
Step 3
temperature reaches 80°C (176 ºF).
Next
Select on the scan tool: Engine/Read data/Group 1 oxygen sensor voltage 1 (Pre-Catalytic oxygen sensor),
Step 4
Group 1 oxygen sensor voltage 2 (Post-Catalytic oxygen sensor)
Next
1V
Pre-catalytic
Oxygen Sensor
0V
1V
Post-catalytic
Oxygen Sensor
0V
Normal TWC
Control System JL4G18-D
DTC Codes Shown
DTC P0420
DTC Code Other Than DTC P0420
Refer to
No
Deteriorated TWC
1V
0V
1V
0V
EC718/EC718RV EC715/EC715RV 10/2009
To Step
2.2.7.11 DTC Code Index
FE02-5092b
2-169
Yes
No