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Re: O2 Sensor Trivia
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Originally Posted by Sendero
Why does the car trip a Check Engine Light with the rear O2's disconnected even though they are turned OFF in the programming?
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Why do the Wideband installation instructions tell you to put the O2 sensor in upstream of the cats because it will give inaccurate readings if the sensor is placed downstream of the cats when all major dyno's use a Wideband sensor that sticks into the tailpipe?
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The car probably gives a check engine light as the sensor itself completes a circuit. Even if the programming does not use the input, it still needs a dummy resistance there. Just a guess based on other experience.
At WOT, the cats are not going to have enough time to do their job and therefore will make little difference in the A/F ratio. At cruising when the exhaust gases are moving much slower is when you would see the most error because of the longer time the gases spend in the cat.
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2001 Cobra 'Vert
Procharged and Intercooled
455rwhp/441rwtq
Work Car:
2005 Honda Odyssey
400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes
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