Hopefully this is the right sub, if not, mods go right ahead and move it on out!


Long story short:

That time of year has come, where I need to put the car back to stock to pass emissions inspection. This is the first year since going turbo (3 years ago) that I've actually had to go through this process, as there was a loophole that since has been closed.


Anyway, got most all of my stock stuff back on, injectors, map sensor, stock ECU, EGR ect ect. The way I designed the kit was to only require swapping of those crucial parts. The charge piping gets unhooked from the throttle body, and the rest of the kit stays in place. I made sure to weld extra bungs into my downpipe/exhaust to simplify this process once a year so both stock sensors, as well as my wideband are always along for the ride.


Headed out for a drive cycle to set readiness monitors and saw p0133 hit the pending on my scan tool fairly quickly. Reset the ECU, same thing.It's a 2 trip code so it will always pop on the second drive cycle after it sits in pending during the first.

The steps to troubleshoot this code are pretty cut and dry from Honda, either the monitor sets, or it will throw this code (primary sensor slow to respond)


I decided to get under the car this afternoon before throwing a possible wasted $100 at the car on a new sensor if it in fact doesn't really need one....for the 1 day I year it's in use.

Noticed that the bung I used while building my downpipe has the primary sensor stepped a decent distance off the exhaust stream (similar to what people do with de-foulers to fool the rear sensors)and this has me thinking. I'm wondering if my placement of the sensor is what's causing the "delay" back to the ECU and triggering the DTC, rather than a faulty sensor.

To my understanding the "slow to respond" is essentially the ECU not seeing the voltage swing within X amount of time.

Anyone else have any experience here? Am I crazy for thinking this? Figured it'd be cheaper to toss a flush mount bung into my downpipe than it would be dropping the $100 on a new sensor, just to possibly be in the same situation.

Pic of current placement below:

 

What state are you in? You can't use kPro at all?

It could be an exhaust leak. That bung does look really tall.

Sorry I don't have any exact help. I hope you figure it out.

 

I'm in NY, upstate though, so no sniffer test, just OBDII readiness.

Exhaust is leak free, Going to cut that bung down to 1/4 of the height and check again, it's 1 inch in length, if ANY of the sensor element is in the actual exhaust stream, it's gotta be very minimal. It's not a hard fault as it doesn't set the code immediately, but it doesn't take long for the ECU to register the slow response and queue that code up in pending.

 

Do you have a KPro? Can't you easily pass obd2 inspection with it?

 

I actually do have a kpro ECU in my RSX-S but that's completely unrelated.

Using it in the s2000 is not exactly a plug and play affair, and the Haltech Platinum ECU that runs the S2000 the other 364 days a year is a superior unit IMO.

But yes, you are correct, KPRO allows you toggle all readiness monitors, and passes OBDII checks easily.

 

Update:

I took the midpipe off the car, cut that 02 bung almost flush. Just reinstalled and took the car out, all monitors set and CEL free in under 10 mins of driving!!!


Time to get my inspection sticker...with my entire turbo kit hanging off the front of my engine

F@ck yea


P0133: 0

Illest: 1

 

Congrats. Glad that was an easy fix.

 

Thanks man. Passed the emissions inspection yesterday with flying colors.

Back to the Haltech we go