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GoldStar
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Dark2k1 said:
What will happen if i don't have a A2 first o2 sensor ?
the primary o2 is a wideband o2. the ecu requires it. if you don't have one you engine won't run right if it runs at all.
 

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2fastxeg said:
the motor wont even start up..
huh? The motor will start and run fine. It'll just throw a code and run in open loop.

The K20 primary O2 sensor is *not* a normal wideband sensor. You must use a K20 O2 sensor. If the CRV or A3 uses the same sensor then fine. But it will cost the same I imagine.
 

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wait, so is the primary 02 sensor from the k20a2 and the a3 the same??? the reason why I ask is because I purchased a primary o2 from honda off of the ep3 si and when I received it, it was the exact o2 as the 99-00 SI o2 sensor
 
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