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Rear o2 sensors necessary on 02 vq35?

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Old 10-16-2006, 09:15 AM
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Rear o2 sensors necessary on 02 vq35?
Hello,
Probably something I should already know but, how does the 02 ECU react if you don't have rear o2 sensors installed? Just a check eng. light or real trouble?

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Fred
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Old 10-16-2006, 09:30 AM
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02+ Maximas are cali spec so they require 2 secondary o2 sensors that monitor the function of the cats.
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Old 10-16-2006, 09:38 AM
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Right, but what does it do if they aren't hooked up? Does it hurt engine performance (limp mode, etc.) or does it simply light the CEL to tell you you have a problem?

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Old 10-16-2006, 10:08 AM
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Originally Posted by Fred Allen Burge
Right, but what does it do if they aren't hooked up? Does it hurt engine performance (limp mode, etc.) or does it simply light the CEL to tell you you have a problem?

thanks
Fred
All you get are rear O2 codes, it doesn't go into limp or anything. Nothing an O2 sim and some resistors can't fix (both the signal voltage from the O2s and the heater circuit resistance have to be simulated).
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Old 10-16-2006, 11:25 AM
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Originally Posted by Puppetmaster
All you get are rear O2 codes, it doesn't go into limp or anything. Nothing an O2 sim and some resistors can't fix (both the signal voltage from the O2s and the heater circuit resistance have to be simulated).
Thank you.

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