Access to 1999 ML430 O2 sensor harness
Thread Starter
Junior Member
Joined: Jun 2008
Posts: 52
Likes: 1
From: NJ USA
ML430 1999
Access to 1999 ML430 O2 sensor harness
Am having trouble with Codes P0141 and P0161 after replacing both sensors. Does anyone know how to gain access to the harness and where it connect to?
I checked fuse F19........but not sure that feed the O2 heaters.
Wanted to check all connectors ............and possibly clean them or look for damage
I checked fuse F19........but not sure that feed the O2 heaters.
Wanted to check all connectors ............and possibly clean them or look for damage
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Joined: Oct 2011
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
The codes are for the rear O2 sensor, so there is a strong possibility that there has been water damage to the connector which is under the front carpet on the passenger side.
Thread Starter
Junior Member
Joined: Jun 2008
Posts: 52
Likes: 1
From: NJ USA
ML430 1999
I bet that is exactly the problem. I have been getting some water in the front passenger seat area. When I replaced the sensor I got some water out of the connector..............but sprayed with electrical cleaner the best I could from under the car .........
I will check this out asap Depending on how the harness goes it might be possible to affect the Bank 1 sensor too,
Thank you so much for the photos and memo..............I have a small compressor now and will blow out the sunroof drain
I will check this out asap Depending on how the harness goes it might be possible to affect the Bank 1 sensor too,
Thank you so much for the photos and memo..............I have a small compressor now and will blow out the sunroof drain
Thread Starter
Junior Member
Joined: Jun 2008
Posts: 52
Likes: 1
From: NJ USA
ML430 1999
You were spot on ! Found the well with quite a bit of water and the wires flooded. One wire came off when I removed the plug. Found it difficult to lift the rug so much, but cut an access hole ( sponge under rug soaked and dripping)
Going to the dealer for a new socket.
I blew out the sunroof drain..........But do you know if there are any other drains that go into the cabin?
Thanks for your help on this........saved me much time
Going to the dealer for a new socket.
I blew out the sunroof drain..........But do you know if there are any other drains that go into the cabin?
Thanks for your help on this........saved me much time
