the oil level sensor is actually the oil temperature sensor that is used by the calculator to measure the level thanks to a mathematical formulaThe 208 GTi BPS (208ch euro6) does not have the oil temperature sensor.
There are only the oil pressure sensor and oil level sensor.
The oil temperature is only calculated by engine ECU and sent to the BSI through the CAN bus (inside the data packet with address 0x488 for the MEVD17.4.4 ECU)
According to the MED17.4.2 Funktionsrahmen also this ecu and probably the MEVD17.4.2 has the oil temperature transmitted in the data package with address 0x488
You are right in saying that the oil level sensor is also the oil temperature sensor; according to the official PSA documentation for the EP6FDTX engine, the oil level sensor (P/N:9806246080) has 3 pins:
1: oil level
2: oil temperature
3: ground
but, unfortunately, the pin 2 is not connected to anything...
it's a resistance probeYou are right in saying that the oil level sensor is also the oil temperature sensor; according to the official PSA documentation for the EP6FDTX engine, the oil level sensor (P/N:9806246080) has 3 pins:
1: oil level
2: oil temperature
3: ground
but, unfortunately, the pin 2 is not connected to anything...
yes is a resistance probe, but you note that:
"The engine oil level sensor is only active when the vehicle contact is switched on and is deactivated when the engine is started."
the resistance variation caused by the temperature is much larger on the "temperature" side than on the "level" side of the probe.
thi is the electrical connection of the probe to the ecu MEVD17.4.4
for completeness of information.
the message with 0x488 address is sent 10 times per second and is composed by 8 byte of data with the following meaning (at least for the MEVD17.4.4 ECU):
Byte 1: water temperature: you need to add +40°C to get the real temperature in °C
Byte 2: volumetric fuel consumption: you need to multiply the value by 80 to get the volume in mm^3
Byte 3: requested engine idle: you need to multiply the value by 8 to get the RPM
Byte 6: oil temperature: you need to add +40°C to get the real temperature in °C
Byte 8: boost air temperature: you need to add +40°C to get the real temperature in °C
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