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Mechanical Problems/Vehicle Issues and Fix-it ForumIf you've got a problem you just can't figure out, a noise you can't diagnose, or a Check Engine Light that won't go away, ask about it here!
i put a vtec motor in a 2001 lx .. has a header with 2 bungs.... the top hole (upstream) has an 02 sensor with a grey connector at the harness... its only throwing 1 code p0141 downstream 02.. but there is litterally knowhere to plug it in (downstream) 02... the EX has the 02 connector near the firewall..this LX does not have that one, for some reason this LX only has the one connector near the thermostat housing. does anyone have any info on where the downstream 02 p0141 plug into the harness?
/\ this guy changes the upstream ( blue connector) thats the one i dont have on my 2001 LX.... im confused because im not throwing an upstream code.. but i got the downstream connected..and im getting that code.. im wondering if the 2001 LX didnt come with a blue connector?
On a D17A1 harness, Both O2 sensor connectors are supposed to be together near the stat housing
You used the original non-vtec harness, yes? Not the harness for the vtec engine?
well its a A2 with an LX harness and an aftermarket header... the blue connector is noth on the harness at all... and i have the grey one plugged in and the upstream code went away.. but the blue MISSING one is upstream.. im so confused
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
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Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518
Re: 2001 LX p0141 location
LX non-vtec harness......
Sounds like connector for sensor 2 might have gotten misplaced, tucked back in a spot and forgotten when the engine was replaced.
Follow the existing sensor connector to the main engine harness and look there for the branch that leads to the "missing" connector..
LX non-vtec harness......
Sounds like connector for sensor 2 might have gotten misplaced, tucked back in a spot and forgotten when the engine was replaced.
Follow the existing sensor connector to the main engine harness and look there for the branch that leads to the "missing" connector..
is the blue connector in the same wire group with the gray one? as pictured... or does that one plum from somewhere else?
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518
Re: 2001 LX p0141 location
Both should 'branch' out of the main harness at the same location IIRC
(they both have to end up in the same spot, so it makes perfect sense they both come out of the harness at the same spot)
I have a diagram that shows both harness connectors for front and rear sensors should be gray ...... blue was not used on the early cars
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518
Re: 2001 LX p0141 location
Originally Posted by 310civicEX
wait.... so the downstream 02 connector is NOT part of the harness? where does it plug into then? lol
The LX car doesn't have what you want.
The EX rear sensor connection comes from one of the dashboard harnesses, but they use different dash harnesses, the harness in the lx car is not prewired for it
The wires for the rear sensor are not in the same places on the different PCMs either
