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Old 10-31-2016, 08:04 PM   #11 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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90 day: 60.02 mpg (US)

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Originally Posted by Gertie View Post
Yes, it is the five wire oxygen sensor that is standard for the VX. I replaced it about three years ago. The car was running perfectly, the ECM was stolen, I replaced it with the exact part number for my vehicle, and now it is throwing a code and not running well.
On page 11-38 of the 1992-1995 USDM Honda FSM Code 48 is identified as a LAF sensor circuit problem. The first suggestion in te trouble shooting flow chart is to reset the ECU. And all the solutions in the flow chart are either (1) replace the sensor, (2) replace the ECU, or (3) find and fix an open in the circuit.


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

Last edited by California98Civic; 10-31-2016 at 08:47 PM..
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Old 11-06-2016, 11:24 PM   #12 (permalink)
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That is exactly what I was looking for! Thank you so much!

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code 48, ecm, ecu

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