O2 Sensor?
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Member
Joined: Oct 2005
Posts: 244
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From: Hunterdon County
'06 E 350 4matic wagon; '05 E 500 4matic sedan; '09 S550 4matic
O2 Sensor?
I'm grasping at straws but is there any chance an O2 sensor fault reading can be related to a gas cap sensor? I've had the CEL light go on many times but rescrewing on the gas cap always cleared it (does a new cap fix this?).
Then last week I was due in for inspection and the CEL goes on on my way to inspection. I pull over and do the rescrew with the cap but it can take an hour to a day for it to clear. The CEL finally goes off in the middle of the inspection but they flunk me because codes still show up.
I head for dealer, computer shows 2 O2 sensor failures, About $250 each for part with labor on top. 140K on car. Just ticks me off, had a B service 2 weeks ago and just replaced bushings and shocks last week and now I'm in for another $900.
Then last week I was due in for inspection and the CEL goes on on my way to inspection. I pull over and do the rescrew with the cap but it can take an hour to a day for it to clear. The CEL finally goes off in the middle of the inspection but they flunk me because codes still show up.
I head for dealer, computer shows 2 O2 sensor failures, About $250 each for part with labor on top. 140K on car. Just ticks me off, had a B service 2 weeks ago and just replaced bushings and shocks last week and now I'm in for another $900.
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Joined: Apr 2007
Posts: 6,171
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Get your own
obd2 reader. Harborfreight tools #94169 read your own codes.
BRICK, NJ 2770 HOOPER AVE, STE 1
EGG HARBOR TWSP, NJ 6701 BLACK HORSE PIKE
EWING, NJ 1550 NORTH OLDEN AVE
ISELIN, NJ 675 US HWY 1 SOUTH,STE 15
SADDLE BROOK, NJ 441 MARKET ST
VINELAND, NJ 20 WEST PARK AVE
o2's are 100k replacement items anyway and you are sending that mush wasted fuel down the pipes if not replaced by 140k. so order the 2 pre cat sensors from www.autohausaz.com
Spray the old ones with pb blaster and disconnect the harness,engine slightly warm get the proper o2 socket twist out the old install the new and you will be in fat city for a ton less money.$260 delivered for both.
The rears are along for the ride and rarely fail.
You will pick up a few mpg and all will be well with the world.
Now if we could just convince you that you can perform your own A and B service and shocks take less than a morning to r/r we could wean you from the crash and burn go to the dealer for everything syndrome
universal splice in o2 sensors from bosch and ngk are even less
fool proof plug and play no solder connections.
BRICK, NJ 2770 HOOPER AVE, STE 1
EGG HARBOR TWSP, NJ 6701 BLACK HORSE PIKE
EWING, NJ 1550 NORTH OLDEN AVE
ISELIN, NJ 675 US HWY 1 SOUTH,STE 15
SADDLE BROOK, NJ 441 MARKET ST
VINELAND, NJ 20 WEST PARK AVE
o2's are 100k replacement items anyway and you are sending that mush wasted fuel down the pipes if not replaced by 140k. so order the 2 pre cat sensors from www.autohausaz.com
Spray the old ones with pb blaster and disconnect the harness,engine slightly warm get the proper o2 socket twist out the old install the new and you will be in fat city for a ton less money.$260 delivered for both.
The rears are along for the ride and rarely fail.
You will pick up a few mpg and all will be well with the world.
Now if we could just convince you that you can perform your own A and B service and shocks take less than a morning to r/r we could wean you from the crash and burn go to the dealer for everything syndrome
universal splice in o2 sensors from bosch and ngk are even less
fool proof plug and play no solder connections.
Last edited by ohlord; Jul 5, 2009 at 07:49 PM.
Member
Joined: Jul 2006
Posts: 193
Likes: 7
From: Alameda, CA
1991 SC Miata, 1999 W210 Estate Wagon, 2014 W212 Sport Wagon
I don't know about the V8, but the V6 pre-cats can be a pain to remove. I had to use a crows foot wrench to get them off (I forgot the size, but since you're heading off to Harbor Freight, their set is pretty cheap. Get the standard ones, not the metric. You'll find that they won't have the proper metric size... I think it's 18mm).
