I'm just installed the DME header, did the anti-fouler trick to the o2 sensor on s-pipe then got the CEL with P0031 code. So I've replaced the primary o2 sensor on the header but CEL still there with same code

Any suggestion?

btw my car isn't under factory warranty

 

P0031....HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

IDK what it means but thats what your code reads.

has something to do with the frist 02 sensor

 

i replaced it with new Bosch o2 sensor but the CEL still there .

 

did you clear the code?

 

i did 3 times already

 

try to replace the o2 sensor on the s pipe... and how did you do the fouler trick on the s pipe?


did you tried to put 3??? i have 3 on my s pipe because the CEL came back with 2 fouler

 

what kind of CEL fix do you have?

Also, what grade gas do you use? Since I was running 93 from my turbo when I installed my header again the ECU was use to the 93 with the header. when I went back to regular gas it made the CEL go back on until I put 93 back in. weird as crap but took the header back off, ran it with regular gas again, then reinstalled the header and cel and hasn't come back on since!

 

i use the anti fouler trick on the s-pipe with 2 spark plug (1 drilled 1/2" & 1 not)

Always use highest gas grade since I bought it

But the CEL code is P0031, is it related to o2 sensor oon s-pipe ? Hmmm

 

^^^P0031....HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

i have no clue what is that means..

 

unless you are running F/I I would save the extra cost on the premium gas and use the regular since that is what the car calls for

you have the anti foulers in the right order? You may also want to try the MMW CEL fix since that is a full pipe with a right angle

 

I'm going to buy 2 more spark plug to install. Let see what happens

 

god .... 4 spark plugs ... clear code .... but still CEL with same code

 

Did you clear the code and then reset the ECU after installing the new O2 sensor?

The code may come back if it's not cleared and the ECU reset.

 

do i need to do both ECU reset and clear code form my scanner?

 

scanner usually does the trick. couldn't hurt pulling the battery lines and doing a full reset

 

if scanner can do the trick, it means the CEL still stick with me ...

 

what kind of bosch p2 sensor did you replace the stock one with? did you make sure to get the wideband? i think it has something to do with the primary o2 sensor.

 

going to ask this since no one has... is it plugged in correctly?

 

sure it is in the hole it supposed to be

 

sounds like another thread we are both on....


bank 1 is the primary on the header

short band replacement of a wide band would still throw a CEL.