Frequently Asked Questions
Question
Upstream oxygen sensor
Answer
Upstream oxygen sensor (1350)
Location : The oxygen sensor is located in the exhaust line, between the engine and the catalytic converter .
The hydrocarbons are compared with the reference air contained in the oxygen sensor to deduce a mixture ratio .
Role of the injection ECU according to the data received :
To determine the fuel / air mixture (richness)
Richness adjustment
Description
The oxygen sensor informs almost continuously the ECU about the air-fuel mixture ratio .
The "rich" or "weak" mixture information is given by 0 to 1 V voltages :
Weak mixture = 0,1 Volts
Rich mixture = 0,9 Volts
A heating device placed inside the sensor enables it to rapidly reach its operating temperature ( + 300 °C) .
Electrical features
The sensor is equipped with a 4 way caliper connector .
Allocation of the connector channels :
Channel 1 : +12 volts supply
Channel 2 : Oxygen sensor heating control
Channel 3 : - signal
Channel 4 : + signal
Details
Info 22 September 2009 by Dave_Retired.
C4 - DS4 Owners
Question
Upstream oxygen sensor
Answer
Upstream oxygen sensor (1350)
Location : The oxygen sensor is located in the exhaust line, between the engine and the catalytic converter .
The hydrocarbons are compared with the reference air contained in the oxygen sensor to deduce a mixture ratio .
Role of the injection ECU according to the data received :
To determine the fuel / air mixture (richness)
Richness adjustment
Description
The oxygen sensor informs almost continuously the ECU about the air-fuel mixture ratio .
The "rich" or "weak" mixture information is given by 0 to 1 V voltages :
Weak mixture = 0,1 Volts
Rich mixture = 0,9 Volts
A heating device placed inside the sensor enables it to rapidly reach its operating temperature ( + 300 °C) .
Electrical features
The sensor is equipped with a 4 way caliper connector .
Allocation of the connector channels :
Channel 1 : +12 volts supply
Channel 2 : Oxygen sensor heating control
Channel 3 : - signal
Channel 4 : + signal
Details
Info 22 September 2009 by Dave_Retired.
C4 - DS4 Owners