Engine code P0152
6th Gear
Joined: Jun 2011
Posts: 14
Likes: 0
From: Virginia
Well, I know this post is old but...here it is 2011, I bought a 2007 Road King Custom from a guy who had it sitting in the garage on a battery tender with only 81 miles on it!!! Yup, hard to believe. So, I changed the oil and filter and started to ride it. I have nearly 750 miles on it now after about 2 weeks. It has run great up until today where I first brought it on the highway for about an hour at 70 mph or so in 6th gear. When I came back off to the back roads the bike stalled on me a few times as I was down-shifting at red lights. It was hot out today, 94 degrees. I later checked the codes at home and found the P0152.
So the 02 sensor says the rear is rich - so...blow back from down shifting will cause that wont it? Oil goes into the filter and then into the rear cylinder and creates a rich mixture right?
Just to be clear, after I changed the oil and rode it for a short while, I got the bike on the highway and did the 30 60 30 routine about 10 times. Since there was very little gas in the bike and no telling what the gas did for being in the tank those years in storage, I ran one full tank through then a second tank with 5 oz of SeaFoam in it. It ran much better after using the SeaFoam. There is no rust or floaters in the tank because I looked in there with a light before I bought it.
But the $10,000 question is will the O2 sensor issue make the bike stall??? I cleared the code and rode it again for a test ride and it did not come back. Not sure when the code happened, it might have been caused by my 30 60 30 routine and not even related to the stalling.
Any help appreciated.
So the 02 sensor says the rear is rich - so...blow back from down shifting will cause that wont it? Oil goes into the filter and then into the rear cylinder and creates a rich mixture right?
Just to be clear, after I changed the oil and rode it for a short while, I got the bike on the highway and did the 30 60 30 routine about 10 times. Since there was very little gas in the bike and no telling what the gas did for being in the tank those years in storage, I ran one full tank through then a second tank with 5 oz of SeaFoam in it. It ran much better after using the SeaFoam. There is no rust or floaters in the tank because I looked in there with a light before I bought it.
But the $10,000 question is will the O2 sensor issue make the bike stall??? I cleared the code and rode it again for a test ride and it did not come back. Not sure when the code happened, it might have been caused by my 30 60 30 routine and not even related to the stalling.
Any help appreciated.
Last edited by Wirat; Jun 28, 2011 at 08:54 PM.
Road Warrior
Joined: Nov 2007
Posts: 1,984
Likes: 7
You can get a O2 sensor code if there is something amiss with the injectors.
There is no code for the injectors, cause they just go and go, but if they get out of sort the O2 sensor gives a code because the reading goes outside of the rance built into the ECM.
Sounds maybe the rear was putting in too much, or to get the amount the ECM was looking for, it had to keep adding fuel till it was out of its set range.
The Sea Foam might have cleared the injector tips and things are OK.
If they start leaking thru the Idle will go out of the range nomatter how much the injectors try to cut back--
Again a O2 code.
That happened to me and was a little confusing till I figured that out.
There is no code for the injectors, cause they just go and go, but if they get out of sort the O2 sensor gives a code because the reading goes outside of the rance built into the ECM.
Sounds maybe the rear was putting in too much, or to get the amount the ECM was looking for, it had to keep adding fuel till it was out of its set range.
The Sea Foam might have cleared the injector tips and things are OK.
If they start leaking thru the Idle will go out of the range nomatter how much the injectors try to cut back--
Again a O2 code.
That happened to me and was a little confusing till I figured that out.
Last edited by Old Gunny; Jun 29, 2011 at 09:29 AM.
6th Gear
Joined: Jun 2011
Posts: 14
Likes: 0
From: Virginia
I emailed SeaFoam about it and they said it should not affect the O2 sensors and suggested I clean the sensor. Also, I think if it was the SeaFoam, both sensors would have the error and not just the rear.
Anyone else have any ideas please chime in! Ride safe -W
Outstanding HDF Member
Joined: May 2008
Posts: 2,543
Likes: 19
From: Ashland Ohio
Two things... an O2 sensor isn't that much money so go to the dealers and buy one. You will need an O2 socket, too. Auto Zone will have the socket.
Something else worth checking. I don't think an O2... no matter what... will make a bike stall out coming to a stop, at other times... maybe, but coming to a stop only? a dirty speedo sensor will cause that to happen for sure. Take that out and clean it.
If the ECM doesn't see the bike slow down, it does stupid crap. Someone recently said it works in conjunction with the TSM... that makes sense to me, I guess... was doing 60, now doing nothing... better kill it kinda thing.
Something else worth checking. I don't think an O2... no matter what... will make a bike stall out coming to a stop, at other times... maybe, but coming to a stop only? a dirty speedo sensor will cause that to happen for sure. Take that out and clean it.
If the ECM doesn't see the bike slow down, it does stupid crap. Someone recently said it works in conjunction with the TSM... that makes sense to me, I guess... was doing 60, now doing nothing... better kill it kinda thing.
Last edited by wurk_truk; Jun 29, 2011 at 09:13 PM.
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