Power Commander, O2 sensor, and error codes

[SkooterG]

Last week, I experienced a condition in which my check engine light came on, along with an error code of 24. More info in THIS THREAD.

This was the second time this has happened to me. Both times, I was at high speeds. Error code 24 is for, "No normal signals are received from the O2 sensor". Well, that's all fine and dandy, but my O2 sensor is disconnected because I have the Power Commander installed. So WTF?

Well, I reset everything again yesterday. Kind of a PITA. Raise the tank, temporarily re-connect the O2 sensor, fuddle with the diagnostic mode and reset the codes, then run a "reinstatement" procedure to clear the error codes.

Anyway, after my thread from last week, showing my condition, I had another forum member PM me saying he had the same thing happen. Similar conditions: He has a PCIII installed with O2 sensor disconnected, and while travelling at elevated speeds, the yellow "check engine" light came on with an associated error code of 24. He didn't know how to reset everything (it's confusing as hell even using the service manual) so he has just been running with the yellow light on for the last year or so.

I thought this was interesting, so my big question is: Is there anybody else out there with the PCIII installed who has experienced the same problems? Check Engine light coming on with error code 24 while, or after running at high speeds?

It would be great to know why its happening, but right now I am just wondering how many it's happening to.

 

[twowheelnut]

Unplug the PCIII, hook back up the O2 gizmo, slow down and call it a day.

Did you call the PCIII dudes? Dat be where I'd start.

 

[SkooterG]

Unplug the PCIII, hook back up the O2 gizmo, slow down and call it a day.

Did you call the PCIII dudes?  Dat be where I'd start.

Slow down?

Not an option.

I have done many other high speed runs without the fault condition happening, so it is not a consistent problem.

Also, no need to unplug the PCIII. I should have clarified this above, but this fault condition does not affect operation in the least. Just an annoyance when that illuminated yellow light doeth mock me. Everything still runs fine.

Contact Dynojet? Perhaps I will. Especially if its happening to others also. If its just the occasional isolated incident, I may not even bother.

 

[Groo]

Skoot,

Just installed my PCIII a few days ago... I'll let you know if that happens anytime soon... hasn't happened to me yet.

 

[radman]

I haven't had the light come on with a disconnected 02 yet-and have done some 125 straight runs for a while, but no top enders with it off. How someone could run a year with that light on is kinda beyond me-would drive me nuts. Not to mention, what if something else happened where the light did indicate a real problem-you'd never know till it got serious, or the bike quit, neither of which sounds like a good option.

 

[ionbeam]

How someone could run a year with that light on is kinda beyond me

Apply as required. '06 model being displayed.

FWIW I have a PCIII, O2 disconnected and having the needle pointing between 2:00 and 3:00 is not uncommon. No nasty yellow light so far. Then again, New England gets really small at those speeds and I probably don't run as far or as long as the SW and W riders can.

 

[radman]

 

[SkooterG]

How someone could run a year with that light on is kinda beyond me

Apply as required. '06 model being displayed.

:rolf: :rolf: :rolf: :rolf: :rolf:

 

[skyway]

This was the second time this has  happened to me.  Both times, I was at high speeds.  Error code 24 is for, "No normal signals are received from the O2 sensor".  Well, that's all fine and dandy, but my O2 sensor is disconnected because I have the Power Commander installed.  So WTF? 

As I mentioned yesterday, since you are getting 15K miles out of your tires, your bike just simply doesn't know WTF is going on when you actually twist the throttle and start hauling.

 

[SkooterG]

This was the second time this has  happened to me.  Both times, I was at high speeds.  Error code 24 is for, "No normal signals are received from the O2 sensor".  Well, that's all fine and dandy, but my O2 sensor is disconnected because I have the Power Commander installed.  So WTF? 

As I mentioned yesterday, since you are getting 15K miles out of your tires, your bike just simply doesn't know WTF is going on when you actually twist the throttle and start hauling.

What's that? Is that wittle missus nocal opening her flapper? :****: Gonna have to talk to your purty bride to have her lay the smackdown on you. :haha:

Wanna know how I get the BIG miles on my tires?

I use every damned cents worth of them, that's how! :****:

Front:

Rear:

And I would have gotten even more than the 12,750 miles that is on that rear tire if it wasn't for that %&*$#@! nail you can see .

 

[twowheelnut]

You can turn on these things, ya know...

 

[SkooterG]

You can turn on these things, ya know...

Where?

I live in desert flatland hell. And you weren't around to show me around when I came calling this past weekend.

 

[twowheelnut]

You can turn on these things, ya know...

Where?

I live in desert flatland hell. And you weren't around to show me around when I came calling this past weekend.

I shoulda made you join us in Coalinga for the CCR ride. Oh, that's right, You were in town for the Livestock Lover's and Anal Massage convention that was going on in Santa Clarita. Wouldn't wanna miss that now, would you?

Oh great. Now here comes FNG to liven things up... Wait for it.

 

[Feejer/Weejer man]

I don't have a very good expaination but when I installed my PC the second time, the guy that put it on the dyno blocked off an air injection hose. He said this injected air to fake out the computer, something for the epa but fools the PC also. don't ask me exactly but it runs like a raped ape aand doesn't stutter at any rpm or speed.

 

[skyway]

This was the second time this has  happened to me.  Both times, I was at high speeds.  Error code 24 is for, "No normal signals are received from the O2 sensor".  Well, that's all fine and dandy, but my O2 sensor is disconnected because I have the Power Commander installed.  So WTF? 

As I mentioned yesterday, since you are getting 15K miles out of your tires, your bike just simply doesn't know WTF is going on when you actually twist the throttle and start hauling.

What's that? Is that wittle missus nocal opening her flapper? :****: Gonna have to talk to your purty bride to have her lay the smackdown on you. :haha:

Wanna know how I get the BIG miles on my tires?

I use every damned cents worth of them, that's how! :****:

Front:

Rear:

And I would have gotten even more than the 12,750 miles that is on that rear tire if it wasn't for that %&*$#@! nail you can see .

:lol:

At least now I understand how you know when its time to change tires, just listen for the grinding of aluminum.

They resemble what came off my bike recently, when them avons wear down it reminds me of riding on a cobble stone road.

 

[jestal]

When you disconnected the O2 sensor is the connector protected from the elements so that no moisture or possibly conductive material cause any sort of fake signals to the PCM?? I disconnected mine and covered the bare connector toward the PCM with the finger of a rubber glove cut off and tie wrapped like a neat little condom over the connector to keep it clean and dry.

The AIR injection system may also be to blame as mentioned. There are some diagnostic code logics used for O2 sensor onboard diagnosis where the AIR is turned off and on (or vice versa) by the PCM while monitoring the O2 signal to see that the O2 responds according the extra oxygen being introduced by the AIR system. Not sure if the Yamaha uses this type of "active" diagnostic test but it is used throughout the industry so plugging and/or disablilng the AIR system might effect a cure or prevent other problems.