[Francis]

Changed to a h-pipe and put mil eliminator on and I'm still getting the check engine light on after the light was shut off, need help to figure out what to do next

 

[GReese87]

What codes are you throwing?

 

[Francis]

Don't know at this moment

---------- Post added at 12:17 PM ---------- Previous post was at 12:15 PM ----------

Can't check it right now, waiting for my friend to get off so I can plug it up and see

 

[Mustang936]

Sometimes the MIL eliminators don't always work, see what codes you are getting to really diagnose the CEL

 

[GReese87]

+1 if its a p0420/p0430 mil Eliminators not working.

 

[Francis]

K will check later to see what the code is

 

[Francis]

Got check engine light checked, and code shows p0156 to rich or to lean, eliminated my cats and the check engine light came on, put on mil eliminators that I got from someone last week and light went out for one day and came back on, could the mils be bad or could my rear 02 sensors be bad.

 

[GReese87]

Most likely its bad 02 sensor. I had a p0158 for 2 weeks every time I would shut it off it would come back on turned out bad 02 It came on right after I did a tune up so I thought it had something to do with that turned out just coincedence it could just b coincedence that it happened after the mil Eliminators. What I did was swapped the wires on the 02 sensors so bank 1 is reading the bank 2 sensor and bank 2 sensor is reading the bank 1 sensor if the code changes to the oppossite bank u found your problem its more then likely the 02 sensor. That's how I narrowed it down. But while I was down there I just replaced both it was worth it at only 48 bucks a piece.

 

[Francis]

Ok thanks man, that's what Im hoping it is but wanted to see what other people thought it could be

 

[GReese87]

Let me know how you make out.

 

[Francis]

Will do

 

[Duke4165]

I've had a similar thing, bought a 98 GT with cats removed and BBK H pipe, check engine light was one so I bought some MIL eliminators and every couple days the chef engine light comes back on, code is a p1443

 

[Francis]

Yeah mine shows up as p0156, going to try new 02 sensors and see if that what it could be

 

[Francis]

Where is the bank sensor 2 located at

 

[Cornkush]

Passenger side rear o2 sensor near stock h pipe.

---------- Post added at 04:41 PM ---------- Previous post was at 04:40 PM ----------

Take a wire wheel or wire brush clean off the carbon put back in reset cel by disconnecting battery for 15-20min then start up see if it comes back before buyi a new one

 

[Francis]

That sounds like a plan

 

[Cornkush]

Worked for me multiple times

 

[Francis]

That sounds like a plan

 

[1996mustang]

Passenger side rear o2 sensor near stock h pipe.

---------- Post added at 04:41 PM ---------- Previous post was at 04:40 PM ----------

Take a wire wheel or wire brush clean off the carbon put back in reset cel by disconnecting battery for 15-20min then start up see if it comes back before buyi a new one

pretty sure bank #2 is on the driver side, since cylinder one is on the passenger side the passenger side would be bank #1, just imo i could be wrong and i dont mind being corrected.

 

[Cornkush]

Dk clean both ig lol takes 5 min