Question about Mercedes-Benz S-Class
If an O2 sensor fails or provides a bad signal, it's caught by comparing the pre-cat O2 to the post-cat O2 and throws a code.Get confirmed if O2 sensors are connected proper and its not getting warm up after starting the car.
Posted on Aug 30, 2010
The 2001 Mercedes s600 mounts 4 standard 4 wires oxygen sensor.
The color code of the wiring may change depending on the brand of the sensors mounted. Mercedes mounts by factory Bosch sensors.
Here the original color codes for factory sensors:
SIGNAL : Black
GROUND : Gray
HEATER (Ignition switched +12) : White
HEATER (Gnd) :White
The most important wire for testing purpose is Signal, this determines the sensors' output.
If colors are different, simply found out ground wire with a multimeter, the two heater wires have usually same color code.
If you are re-wiring, the heater contacts can be exchanged, the heater works the same in both ways.
In case the car is mounting a different sensor, here wiring diagram for sensors from different manufacturer. If this satisfies the query, please do not forget to accept the solution.
Posted on Aug 29, 2010
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Posted on Jan 02, 2017
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