Code 43 After two O2 Sensor Replacements

[Vex]

I made a thread not to long ago about the CEL code 43.

From the start, I got the code and people said its the o2. I went to autozone and bought a bosch one, worked for about a month, then CEL came back. Then bought a Denso, worked about a month and CEL came back.

Here are the symptons.

1. Bogging, wont accelerate unless I gas more!
2. Big pop noise when I come to a stop sign, only happended today, came to a stop at a stop sign, and bam, POP, but my car still roles and engine stayed on.
3. Bad gas mileage.
4. When I come out of a turn, stop light, corner, it will get stuch at like 1-2k rpm until I gas some more then it gets out of it.

These symptons ONLY exist when and after I get the CEL codes.
But when I put in a new O2 like my last two, they worked fine for a month.

When I replace the o2, all this crap goes away, but after a month, they all come back with the 43 code cel.

I did however put the p12 ecu on my car not to long ago, it ran fine with the pt3, but who knows, the cel coulda came back with both ecu's even if I did leave the pt3 in there. I reset my ecu, disconnect batteries when I change o2, changed the ecu. Idk what else. My car runs fine, no overheating, oil leaks, engine is clean. But this code 43 is haunting me. I am really considering getting this fixed and getting rid of the damn thing now. My car idles about 600-800, I might raise it up to 1k. Since my car shakes mad crazy.

EDIT :

When I used to check for CEL codes, only my engine light comes on, but today, when I checked, (jumping the two pins under glovebox) my engine light and S light flashed, wtf?

[GenieMobile90]

this has also been hunting me for a while now..i wish i had an answer for you and myself ive been through 3 o2 sensors, an engine swap and three different ecus im starting to think its a ground or a bad wire harness..

[GhostAccord]

Code 43 can be related to a problem with the fuel supply sytem.

• Fuel pump
• Fuel Filter
• Injector resistor
• Injector

[blazedealh91]

what brand o2 sensore did you use

[wed3k]

pull the spark plugs and see if they look good. there may be something thats causing the o2 to read really rich or lean. id check o2 signal at the ecu and make sure it is making it there. if the average is 450mV at the ecu then it could potentially be an ecu issue which would be weird because you've swapped ecu's.

[904drACCORDMANG]

If you have an a6 or equivalent the o2 should be in the down pipe, if so a bad header gasket would make the car "pop" and give the o2 a faulty reading so you might want to check your gaskets esp if you have an aftermarket mani.

[deevergote]

what brand o2 sensore did you use

Read and you will find out. He's pretty clear about that.

[GenieMobile90]

not to thread jack...

Code 43 can be related to a problem with the fuel supply sytem.

• Fuel pump
• Fuel Filter
• Injector resistor
• Injector

i will be checking these,

what brand o2 sensore did you use

i personally used bosch.

pull the spark plugs and see if they look good. there may be something thats causing the o2 to read really rich or lean. id check o2 signal at the ecu and make sure it is making it there. if the average is 450mV at the ecu then it could potentially be an ecu issue which would be weird because you've swapped ecu's.

i will also be checking this

If you have an a6 or equivalent the o2 should be in the down pipe, if so a bad header gasket would make the car "pop" and give the o2 a faulty reading so you might want to check your gaskets esp if you have an aftermarket mani.

all my gaskets are new

[wed3k]

my bosch universal has never given me a code, while the response time for the lean to rich switching is slow (like 300ms compared to the recommended 150ms), it has never set a code and ive had it for a couple of years.

[904drACCORDMANG]

I just got a NTK from summit for 60 shipped Bosch might work but why not shop around and get one made for your car

[GenieMobile90]

im on my third bosch.
my first lasted a while,
my second was the universal(which lasted longer than the first).
and my 3rd(newest) pulls code after 10mins of driving, stays on for about 5 to 10 mins, then turns off...im starting to think its the car

[Vex]

pull the spark plugs and see if they look good. there may be something thats causing the o2 to read really rich or lean. id check o2 signal at the ecu and make sure it is making it there. if the average is 450mV at the ecu then it could potentially be an ecu issue which would be weird because you've swapped ecu's.

Yes I can check my spark plugs but no clue how to check how much mV is at the ecu. I will return back to the PT3, drive for a bit and see if the symptons still exist, I have no issue at all on staying on the PT3, just that the P12 adds a bit more to the engine and better when on the highway to overtake, or go uphill since our f22ax's are 17+ years old.

im on my third bosch.
my first lasted a while,
my second was the universal(which lasted longer than the first).
and my 3rd(newest) pulls code after 10mins of driving, stays on for about 5 to 10 mins, then turns off...im starting to think its the car

Bosch is not reccommended for our car, if you look around, no one has had any luck with bosch. Go to rockauto.com and buy a denso/ngk/ntk oem fitted sensors there. You have better luck with those 3 brands.

If you have an a6 or equivalent the o2 should be in the down pipe, if so a bad header gasket would make the car "pop" and give the o2 a faulty reading so you might want to check your gaskets esp if you have an aftermarket mani.

Everything is OEM, IM, Headers, Exhaust, Gaskets.

The only small mods I have are a Intake Cone, and the P12.

I myself know the Intake cone is not the issue. I knew the Pt3 was running good, but all it must've needed was some time too and it could've ended up like this as well, but who knows, never know till you try.

what brand o2 sensore did you use

Agree'd with deeve, please read brotha.

I just got a NTK from summit for 60 shipped Bosch might work but why not shop around and get one made for your car

If you are getting CEL 43 code, dont be to relieved, not just the o2 sensor takes care of that code as you can see. It's a pain driving when your car wont accelerat past 2k rpm until you gas it all the fucken time out of a stop, bloody hell it makes me so mad, I just want to take it from first to fourth all the time full gasing, sheesh, I love it when it rides good, but when it becomes like this, I have not the time to fix it, schools coming up and I thought I had a good running car

[turboAccordHSF]

my cb7 went through three 02 sensors as well.... try this, get your 02 sensor and smell the plug if it smells like burned oil than the plug that you connect it to might have old oil, grease even a lil antifreeze can cause it to fry, try to clean it out ith electric un flammeble liquid and just blast it out.....i even changed the plug by just snnatching another one from a junks cb7 i just cut all 4 wires and then re wire the new one......

[Vex]

my cb7 went through three 02 sensors as well.... try this, get your 02 sensor and smell the plug if it smells like burned oil than the plug that you connect it to might have old oil, grease even a lil antifreeze can cause it to fry, try to clean it out ith electric un flammeble liquid and just blast it out.....i even changed the plug by just snnatching another one from a junks cb7 i just cut all 4 wires and then re wire the new one......

I can try this as well, thanks man.

[turboAccordHSF]

oh and on thing you should try is clean your EGR vlave iit might be dirty as fuck...lol...or if your egr aiint working then just replace it....this fixed iit in my first cb7 when it started bogging......