Geely EC718 2009 Workshop Manual page 199

Engine
DTC Code
Post-Catalytic Oxygen Sensor
P0138
Voltage Too High
1. Oxygen Sensor Signal Circuit
Open
P0140
2. Oxygen Sensor With High
Resistance at High Temperature
1. Post-Catalytic oxygen sensor
voltage is continuously low.
P2270
P2271 2. Post-Catalytic oxygen sensor
voltage is continuously high.
DTC Detection Strategy
Control System JL4G18-D
Conditions For Setting The DTC
(Control Strategy)
1. Post-Catalytic oxygen voltage
signal is greater than 1.5 V.
2. Battery voltage is greater than
10.98 V.
3. Engine speed is greater than 25
rpm.
4. Target excess air coefficient is
equal to 1.
5. Three-way catalytic converter
temperature is higher than 320°C
(608 ºF).
6. Battery voltage is greater than
10.98 V.
7. Post-Catalytic oxygen sensor
reaches the normal working
temperature.
1. Post-Catalytic oxygen sensor
voltage is between 0.42 V and 0.5
V.
2. Post-Catalytic oxygen sensor
resistance is greater than 40,000
Ω.
3. Post-Catalytic oxygen sensor
reaches the normal working
temperature.
1. Post-Catalytic oxygen sensor
voltage is less than 0.6 V.
2. Post-Catalytic oxygen sensor
voltage is greater than 0.6 V.
3. Post-Catalytic oxygen sensor
reaches the normal working
temperature.
EC718/EC718RV EC715/EC715RV 10/2009
2-117
Fault Locations
5. Three-way Catalytic
Converter
6. ECM
1. Sensor Circuit
2. Sensor
3. Mixture Too Rich
4. Mixture Too Lean
5. Three-way Catalytic
Converter
6. ECM