mikej94civex

ok i got a code 41: "Primary oxygen sensor heater" umm i don't understand this code, i HAVE searched
and i can't figure out what to repalce...the o2 sensor is only couple mths old so i'm sure it's fine. The cel
only comes on time to time randomly, lately tho, last few days it's been on 24/7 so i'm sure the problem
is gettin worse, anyways what does this code mean and what do i need to do to fix it? Thanks

mikej94civex

ok i c on some other threads here tht if the o2 sensor is good it could just be a loose wire somewhere
under the hood on a 'sub-harness' umm where is this located, and anyone got a pic of what wire/s i need to check?

btw:the car runs fine, neither rich or lean, and i have great mpg soo it's just electrical then rite?

mikej94civex

?anyone?

kaiba

A few information may help.
Year:
Model:
Engine:
ECU:
MODS:

mikej94civex

year: 1994
model: civic ex
engine: d16z6
ecu: p28, non chipped
mods:i/h/e

mikej94civex

I have tried resetting the ecu, it just clears the code for a few days then it comes rite back..again the o2 sensor is fine..

mikej94civex

guys rly...what is an oxygen sensor heater?? i can't understand this code...please help
with this i hate havin a cel

Anon51

did you replace the o2 with an oem part or something you got from autozone? bosch or some other random name.

mikej94civex

autozone part, i belive bosch...but the car ran fine cel free for almost a yr now since tht o2 has been in there..

mikej94civex

last nite my buddy and i were cruisin around and my cel, the code 41, was on and off throughout the nite
and only came on after hittin a bump or vice versa...does this mean it's just somethin lose then? i mean
if the o2 was actually bad, wouldn't the code be solid till replaced? btw when the cel is on my mpg drops
significantly and it runs rly rich..

HondaPartsHero

https://honda-tech.com/forums/hybrid-engine-swaps-18/%5Bfaq%5D-%22my-vtec-doesnt-work%22-1812135/

halfway down is the factory service manual troubleshooting guide for that code

mikej94civex

thanks!