2000 ML320 Oxygen Sensors - Help
 

All,
I have been trying to figure this out for a while. My 2000 ML320 is displaying O2 errors for all 4 oxygen sensors. I have tried a few things but wanted to share if it is common all 4 sensors go bad at the same time.

Codes:
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0161 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)

I am thinking to buy all 4 bosch 13782 sensors but wanted to check if there is anything else i should check before buying all 4. the Mechanic replaced Relay K28 with fuse F45 but not really sure if this makes any difference.

advise will be appreciated.

Check fuse #19.

Maj,
Acoording to the machinic fuse is good.

what else could it be?

According to the mech. is not good enough. You should see to it yourself.

Is this you on a different forum using a different name?


http://www.benzworld.org/forums/w163...l#post16603689