Does it makea difference swapping O2 sensor input wires left for right?
Thread Starter
Safety Car
Joined: Oct 2000
Posts: 4,949
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From: Monticello MN
Does it makea difference swapping O2 sensor input wires left for right?
I've heard of people doing this in order to make the wires fit following a header installation. In considering headers, would this make any difference to the computer, or should a person spring for connector extensions? I wouldn't think the computer could adjust for each bank of the engine, but I may be wrong. I do realize it adjusts for varying inputs, but don't believe it can adjust one bank vs the other. Thanks!
Ed
Ed
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Joined: Feb 2003
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From: Plano Texas
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St. Jude Donor '07-'08-'09-'10-'11-'12-'13
Re: Does it makea difference swapping O2 sensor input wires left for right? (C5XTASY)
I beleive it will cause a problem. Once, when I was replacing sims (at LGM), by mistake they reversed the wires. The car kicked codes, and ran very poorly.
Safety Car
Joined: Mar 2001
Posts: 4,174
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From: Parker Colorado
Re: Does it makea difference swapping O2 sensor input wires left for right? (AC54ME)
I beleive it will cause a problem. Once, when I was replacing sims (at LGM), by mistake they reversed the wires. The car kicked codes, and ran very poorly.
This was for the fronts.
Drifting
Joined: Jul 2000
Posts: 1,818
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From: SoCal
Re: Does it makea difference swapping O2 sensor input wires left for right? (C5XTASY)
Yes, the computer adjusts for both sites. You have 2 short term fuel trims, and 2 long term fuel trims, and 2 sides worth of O2 sensors. This isn't a coincidence ;)
Crossed wires will cause the car to run very poorly.
Crossed wires will cause the car to run very poorly.
Burning Brakes
Joined: Aug 2000
Posts: 1,132
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From: Morganton, NC, USA
Re: Does it makea difference swapping O2 sensor input wires left for right? (jmX)
If you're talking about the primary O2's before the cats, then they have to be left to left and right to right because these feed back to the main engine computer to adjust mixture. I think all the rear O2's do is tell the computer that either or both cats are not working properly. I have my rears crossed and no problems occur. :yesnod:
Team Owner
Joined: Apr 2001
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From: S.W. Ohio. . . . . . NRA Life Member
Re: Does it makea difference swapping O2 sensor input wires left for right? (2kbluestreak)
2kbluestreak is correct. The front ones should not be crossed, but the rear ones can be.
The odd part about the rear sensors is that they are already crossed from the factory. The driver side cable actually connects onto the passenger side rear sensor - and vice-versa.
The odd part about the rear sensors is that they are already crossed from the factory. The driver side cable actually connects onto the passenger side rear sensor - and vice-versa.
