engine check light; wat's wrong?


M

moon*

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Mar 19, 2008
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hey guys.. jst wanna see if any of u can help me out with my ecu

previously b4 my ecu management, i didnt have engine check light error b4.

after installing the feels/mugen rechip + emanage blue. i once awhile keep getting a engine check light.

n everytime it goes on, i bring it for a checkup; it ended up showing o2sensor faulty. BUT the thing is, i change like 5 times alreayd... still it shows the 02sensor error.

any idea?? IF lets say the 02sensor is faulty, wat does it do or affect my engine?? cos currently, i dont feel my engine giving problem, or getting high fc or lost in power.

i m still able to get like 500km mileage with every full tank of petrol i pump

thanks :)
 
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Did you replace the sensor with a brand new one? Have you checked your wiring?
 
u mean the o2sensor? no i didnt reset the ecu, do i have to? but i m running on a emanage blue. i dont go thru my stock ecu anymore right?

but the weird thing is.. its not all the time when i start my engine it will show the light.

once in a blue mood, it will pop up. yesterday n today whole day on issue.

alittle confused here.. lets clear the doubts.. if i m running on stock ecu, yes den i'd have to reset the ecu.
but now i've rechip it with a feels chip, + add on a emanage to fine tune it.

so.. i dont need to reset it right?

blinx9900 said:
um, have you reset the ecu after installing the new sensor?
Click to expand...

no, i didnt replace to a new one. i used my fren;s sensor where by his never gave the problem. n till now ,on his ride no engine check light.
NZ_EK9 said:
Did you replace the sensor with a brand new one? Have you checked your wiring?
Click to expand...
 
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you are running a stock ecu with EManage?

has your car been de cated?
on my s2k if you De cat it you need an antifouler plug to space out the o2 sensor on the cat.

Emanage doesn't have the option to disable the o2 sensor?
 
same is happening to mine since i changed my manifold. think its only saying there are higher emmissions. i never changed my sensor yet. its €200

people keep telling me to just unplug the engine check bulb...Ye advise this.?
 
may be a wiring or earthing issue if its a reoocuring fault
 
ehh.. yes my car have been de-cat.
i dont recall if they have the option,mebbe i can go back n check.

BUT if they do have the option, izzit recommended to disable it?? i mean wat happen if the 02sensor in future really becomes faulty, wat will happen?

how does tis antifouler plug look like?
mugen889 said:
you are running a stock ecu with EManage?

has your car been de cated?
on my s2k if you De cat it you need an antifouler plug to space out the o2 sensor on the cat.

Emanage doesn't have the option to disable the o2 sensor?
Click to expand...


haha.. same, my fren was like.. unplug the bulb only :p by sometimes if ur engine really got problem, u wont know.
denward said:
same is happening to mine since i changed my manifold. think its only saying there are higher emmissions. i never changed my sensor yet. its €200

people keep telling me to just unplug the engine check bulb...Ye advise this.?
Click to expand...

other wiring i m not sure, but earthing, the mech use some sort of wire n attached it to the reader n it seems alrite.

anyone facing tis problem?
olly ek9 said:
may be a wiring or earthing issue if its a reoocuring fault
Click to expand...
 
what is the exact code that it is throwing? Is it the primary O2 sensor that is showing it or the secondary one as mugen889 has suggested?

Do not unplug the check engine light. If your car has some other faults, you can't really figure out what's wrong unless you get your mechanic to read it with an OBD2 scanner.

If something goes wrong and it happens to be engine related, I'd want to know right away instead of going to a garage. I guess I like to play doctor :p
 
the mech check b4, its showing a o2sensor faulty code;
but change couple of times for the sensor. still the same.

anyone have a pic of the antifouler plug??
 
denward said:
same is happening to mine since i changed my manifold. think its only saying there are higher emmissions. i never changed my sensor yet. its €200

people keep telling me to just unplug the engine check bulb...Ye advise this.?
Click to expand...
thats a stupid idea, the light is on for a reason and should be diagnosed and sorted,taking the bulb out is just like out of sight out of mind which is pointless.

mugen889 said:
you are running a stock ecu with EManage?

has your car been de cated?
on my s2k if you De cat it you need an antifouler plug to space out the o2 sensor on the cat.

Emanage doesn't have the option to disable the o2 sensor?
Click to expand...

o2 sims/antifouler plugs are for s2k, ep3 dc5 etc which have 2 lambda/o2 sensors one before the cat and one after. b series cars have one o2 sensor only and will be fine to de cat with out doing anything to alter the signal from the o2 sensor....you do not require a "antifouler"
 
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hiya mate im jus new 2 this site jus wanted 2 ask u a question bwt mi ek9 , wats happened is that i wash my engine dwn and 1 of mi spark plugs got wet an mi car started 2 do missing so i went 2 shop an i bought 4 new super 4 spark plugs an and leads and now that av replaced all that the is nt stating iv even checked the distorbuter cap and thats fine so wat do you think can be the problem plz rite bk az soon az possible me baz
 
gulbaz said:
hiya mate im jus new 2 this site jus wanted 2 ask u a question bwt mi ek9 , wats happened is that i wash my engine dwn and 1 of mi spark plugs got wet an mi car started 2 do missing so i went 2 shop an i bought 4 new super 4 spark plugs an and leads and now that av replaced all that the is nt stating iv even checked the distorbuter cap and thats fine so wat do you think can be the problem plz rite bk az soon az possible me baz
Click to expand...

Ever heard of the letter "y" and paragraphs?

Remove all your sparkplugs, pull the ECU fuse located under the bonnet (this prevents the injectors from dumping fuel). It ought to be a 15amp one. Try starting the car and the remaining water should pump out.
 
moon* said:
the mech check b4, its showing a o2sensor faulty code;
but change couple of times for the sensor. still the same.

anyone have a pic of the antifouler plug??
Click to expand...

Is it the primary O2 or the secondary O2 that is showing on the code?


b16 mini said:
thats a stupid idea, the light is on for a reason and should be diagnosed and sorted,taking the bulb out is just like out of sight out of mind which is pointless.
Click to expand...

Well said. My car ran with the 02 sensor code because I knew it was the secondary O2 and not the primary. However if I noticed stumbling or decreasing mileage per tank, I could check the code again and see if it was the primary that has failed also.
 
wats the difference between the first n 2nd O2sensor code??

the mech jst told me its the o2sensor, didnt mention anything about primary or secondary.
 
primary is responsible for the AF mixture.

secondary is responsible for detecting the "mixture" after it passes through the cat. If the mixture isn't clean, it will throw a code. In this case, since you are running a de-cat, well it's obvious that the emissions are very high.

Check the code yourself and report back what you see.
 
OH... IC.. thanks :)

let me check with the mech again to see if its primary or secondary.

cos currently my A/F is set to around 13.5
it should be alrite right?? so far.. the fuel consumption is like normal, no major drop



RagingAngel said:
primary is responsible for the AF mixture.

secondary is responsible for detecting the "mixture" after it passes through the cat. If the mixture isn't clean, it will throw a code. In this case, since you are running a de-cat, well it's obvious that the emissions are very high.

Check the code yourself and report back what you see.
Click to expand...
 
RagingAngel said:
primary is responsible for the AF mixture.

secondary is responsible for detecting the "mixture" after it passes through the cat. If the mixture isn't clean, it will throw a code. In this case, since you are running a de-cat, well it's obvious that the emissions are very high.

Check the code yourself and report back what you see.
Click to expand...

according to that graph his car has a b16 a, correct? i've never seen a b16 a with a secondary o2 sensor, they only have one which is before the cat!!!
 
the 16A2 in USDM motors found in 2000Si/SiRs have the secondary O2 sensor in place. With that said, I'm not sure if the OBD2 cars from Japan have this nuisance of a sensor now that I think of it....
 
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