Changan CS35 - Page 169

CS35 2013.04
3.1.13-153 3.1.13-153Electronic Control System - ME7
2. Possible Sources
Fault
Code
Test Tactics
Setting Conditions (Control
Strategy)
Fault
P0136
The short circuit
between the post -
catalytic oxygen
sensor signal and
the heating wire
• Post - catalytic oxygen sensor voltage
reaches working temperature
• Oxygen sensor output voltage is
higher than 2.0 V
• Sensor circuit fault
• Sensor fault
• ECM fault
P0137
Signal short circuit
to ground
• Post - catalytic oxygen sensor output
voltage is less than 0.06 V
• Post - catalytic oxygen sensor voltage
reaches working temperature
P0138
Rear oxygen volt-
age is too high
• Post - catalytic oxygen sensor voltage
is higher than 1.5 V
• Engine speed greater than 25 RPM
• Targetvλ ＝ 1
• Catalyst temperature is higher than
250 ℃
• Oxygen sensor voltage reaches work-
ing temperature
• Battery voltage higher than 10.68 V
P0140
Post - catalytic
oxygen sensor sig-
nal open circuit
• Post - catalytic oxygen sensor voltage
reaches working temperature
• Post - catalytic oxygen sensor voltage
range 0.4 ~ 0.5 V
P2270
Post - catalytic
oxygen sensor volt-
age is always low
• Post - catalytic oxygen sensor voltage
is less than 0.577 V
• Access to diagnosis request
P2271
Post - catalytic
oxygen sensor volt-
age is always high
• Post - catalytic oxygen sensor voltage
is higher than 0.640 V
• Access to diagnosis request
mashinesoft.com
09120146259