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CEL Code 43 Information

 
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Old 06-18-2013, 11:19 PM
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CEL Code 43 Information

code 43 sucks, thats a given, same as any CEL... but this one is particularly hard if you go about it the wrong way.

most people automatically say, replace your o2 sensor.

i did not listen because my o2 sensor was replaced in april 2012, and originally got my CEL code 43 october 2012.
i tried almost everything

fixed exhaust leak
replaced spark plugs
seafoam treatment
replaced spark plug wires
replaced fuel pressure regulator
replaced almost all vacuum hoses
swapped ecu's with a known good ecu
unplugged my o2 sensor to make sure it wasn't the o2, still got code 43
fuel filter
etc, etc, etc....

do NOT do this... it will cause you a huge headache and tons of stress. although this was good maintenance, i was not truly diagnosing and fixing my problem. my car now runs alot better, but still did not solve my code 43.

I bought a craftsman multimeter about 4 days ago to follow the service manual, but was iffy about attempting the tests because it was like Chinese, excuse me, Japanese to me....

when i was ready to give up today and take it to a shop to get it diagnosed, i called several shops and got quotes from $80-$123 just to diagnose my problem.... But, nobody could look at my car until tomm.

this was no good for me, so i went outside in the pouring rain, pulled my carpet back to reveal my ecu, and followed the directions in the service manual.

read the voltage from A26 to D14 and it read .8v
to move on, crawled under the car, unplugged o2 sensor, and went back inside to read voltage from A26 to D14 again. now reading 1.8v

what was Honda's answer??? REPLACE O2 SENSOR!!!!!!!!
i was skeptical of course, but bought a new bosch o2 sensor from autozone, came home, got my flashlight out at 9pm, and installed my new o2 sensor.

did the rpm to 3k test in the service manual at operating temp, that i have been doing the whole time replacing parts, but this time, NO CEL AT ALL

YUP, NO MORE CODE 43!!!

lesson is, Follow the service manual, and you wont be disappointed.

Last edited by ProjectPrelude95; 06-18-2013 at 11:24 PM.
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