morphiz

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.

Maj. Dundee

Check fuse #19.

morphiz

Maj,
Acoording to the machinic fuse is good.

what else could it be?

Maj. Dundee

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