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1997 Honda Civic
Problem for Honda 1997 Civic

My engine light won't go out even after sensors have been replace




By jesseado on Feb 18, 2009

" "
I recently bought a 1997 Honda Civic LX, with a 1.6 liter 4 cylinder engine. The engine light was on so I had it analyzed and got a PO 135 code, i.e. oxygen sensor #1, heater circuit. I have changed both sensors out and have checked wiring and connections and still the light stays on and I continue to get the same code. The exhaust manifold has been repaired at some point by welding a bead in the middle right next to the #1 sensor. Could this be my problem???
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Clarification Request

Posted by c38hot on Feb 23, 2009

did you clear codes before test drive ? how did you check wiring ? was there continuity from computer pin to oxygen sensor connector ?

Posted by phillip_aull on Feb 20, 2009

did you clear code after replacing o2 sensor as it will not go out automatically

Best Solution

posted on Mar 17, 2009
Very Helpful)

bub 1955
bub 1955

Rank: Apprentice 
Rating: 100%, 1 votes
remove brackett from under intake manifold to block you will see a gray or green plug look real close and you will see a bare wire or a wire that has been pinched real bad this wire controls heater circuit for the o2 sensors also check fuse # 15.there is a tsb from honda on this problem
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Solution #2

posted on Mar 12, 2009
Not Rated)

luxur4
luxur4

Rank: Guru 
Rating: 90%, 25 votes
After replacing the Oxy-sensor the ECU has to be reset to clear the fault.
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