2012 Road King, rode to work yesterday morning was running fine. When I went to leave work, it seemed like it was running a little rough, It was a warm day, I was watching my ET on my power vision, it was a little high, nothing to be overly concerned with. Then the engine light and battery light came on, and the Temp rose about 10 degrees. Once I got across town both lights went off, temp slowly went down. When I got home I check errors on the power vision. It showed low voltage to front o2 sensor and to rear o2 sensor, a couple other low voltage and then low voltage Battery. I cleared all the codes. Put the tender on and it charged about 5 minutes, then went into standby/maintain mode. I started it up and it ran fine. I checked all the battery connections, and looked for any obvious chafed wires, everything looked good. Anything else I should check, or just ride it again Once the rain stops and see if it happens again.

 

2012’s had voltage regulator issue, perhaps yours is one of them. M1235A

 

It was replaced when new under the recall. Everything seemed to be working fine, all the lights, Acceleration was fine, just a little rough.

 

Chalk it up to bad gas? Ride the tank out. Probably not but possible. I had a bad tank in my work truck not long ago.

 

Sounds much the same as when my voltage regulator slowly died. Many repeats of what happened to you, they got more and more frequent until I replaced the VR. Has never happened again.

 

Thanks for the reply, I was getting pretty low on gas, So I'll fill up and see if that makes any difference, Is it normal for the Voltage Regulator to go bad? Mine was replaced in 2012 and I have about 35000 miles on it.

 

My recent problem, At the end of last season my starter sounded funny. I always put it on a tender because I don't know when I'll get to ride. So just short rides all last season.
Over the winter I did a stage 2 and was taking short rides again to see if I screwed anything up.
Anyway, I went out for a 120 mile ride on Saturday, stopped and stretched my legs. Bike wouldn't start, fortunately I had a jump pack. Road 60+ miles to get home. That's when I got to trouble shooting.
8.4 volts at the battery running or not, idle to 3k.
Checked stator voltage 1 idle to 3k @ 20 volts AC per k, I had 20-60 volts. So stator is good. Battery took a charge from the tender, Voltage regulator is bad.

 

I had a problem like this once, had a bad terminal in the connector from the stator to the VR that caused an intermitant charging problem . Check the 3 prong plug for corosion

 

Voltage regulator failures can be common. I'm on my fourth at 138,000 miles but one was my fault from jump starting a completely drained battery. If you are getting low voltage, I would look at the stator. Usually, but not always, you get high voltage codes from a faulty regulator. Stator failure is low or now voltage. If it is the stator, change both it and the regulator.

Do you have a multimeter? If not, get one. The $10 ones at walmart will work good enough. There is a sticky here on the forum on how to troubleshoot stator and regulator. Also many video's on youtube.

Good luck.

 

I got low voltage to 02 sensors on the Jeep cuz of oil dripping on it.
Cleaned it cleared it.

Sounds like yours fixed itself on the rode home.

Sorce