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Number of O2 sensors on 4th gen Prelude

 
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Old 05-10-2013, 11:06 PM
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Number of O2 sensors on 4th gen Prelude

So, my car has a catalytic converter light on atm. It stays on as soon as i start the car and does not disappear. The previous owner told me that its prob a sensor that needs to be replaced. I have had a look at the O2 sensor today when i got under the car but didn't take it out. It did look a bit worn, also rang a muffler shop and they said if the light is on, prob cat is blocked up or overheating. Also my cel has come on but only when driving, I think if i drive it hard the light comes on. Just been reading up the forums and bit confused, does the 4th gen Prelude have 1 or 2 O2 sensors and if so where are they? I know on my one there is one sensor after the cat. But I have read that 5th gen preludes have 2 one b4 cat and one after. So help me out here ae? and if anyone knows a solution to my problems but great if they could chip in.

P.s- getting a 2nd hand cat and o2 sensor from a friend going to try and put those on and see if it helps.
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Old 05-10-2013, 11:11 PM
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Re: Number of O2 sensors on 4th gen Prelude

OBD1 4th gen Preludes have 1, OBD2 4th and 5th gens I believe have two. 1991(JDM) through 1995 is OBD1.

If you're able to unscrew the sensor from the exhaust pipe, try blasting it with some electrical parts cleaner, or if you can't get it out, try running through a seafoam treatment before your next couple oil changes. OOORRR just go buy a new one for $55 from Napa or sparkplugs.com.

https://www.google.com/#q=ntk+24169&...=1958&bih=1137
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Last edited by Lindso; 05-10-2013 at 11:15 PM.
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