Hopefully someone can give me information on a fault code I'm getting after the "engine" light intermittently comes on, then resets itself after a few miles.
I get two codes, one is PO152 which is on my list as the "Rear Oxygen Sensor (rich)".
The other code which appears under the same "P" heading at the same time is PO572 which is not on any list I can find. Does anyone know what this code is referring to?
Thanks
Sketz

 

po572 =brake switch low, whatever that means.

 

Thanks "Big". That could explain a lot - while riding yesterday my riding buddy noticed that it took some time for my "stop lights' to turn off. I thought maybe I was just riding the brake, but I just checked again while in the garage by hitting the rear brake and sure enought the lights stayed on. Guess I need a new switch!!

 

wonder if the o2 wires and brake switch wires aint "talkin" to each other.

 

Good thought! I'll be check'n on that.

 

Is your bike stock?

 

The Rich O2 Sensor code is due to one of three things:
1.) The mixture really is rich (This is the most likely cause, usually 95%+ of the time),
2.) The O2 Sensor is Silicone Poisoned. Getting silicone into/through the engine while the engine is running. Spraying S100, Pig Spit, Armor All, or other detail stuff that contains a high concentration of Silicone in or near the air cleaner while the engine is running will cause this. If you remove the O2 Sensor and it has a light dusting of a whitish/gray delicate powder on the part of the O2 sensor that is in the exhaust stream . . . silicone poisoning is the cause.
3.) There is a short to power between the O2 Sensor and the Computer. This is extremely rare . . . . unless someone who doesn't know what they are doing, has been messing with the wiring harness.

 

Thanks everyone that's all good info and gives me plenty to check on today, and yes, blusmbl, the bike is stock (engine anyway)

 

Read page 4-135 in your 2008 EDM. It will explain how to troubleshoot it. See attached

 

Thank you Dawg, that was super helpful, just what I needed!!