Need Suggestions Please
Thread Starter
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Road Master
Joined: May 2012
Posts: 1,140
Likes: 6
From: Arkansas
Just a little update for anyone who cares. The P0051 code is for "low current on the rear O2 heating element". I know that this is only an emissions control issue. But the dash light drives me crazy. Found the sensor make and wiring diagram on the net today. So I ran a continuity meter across the element to varify. The element read "open". So I will be on my way to HD this evening to get a replacement. Gonna try and get them to replace the sensor under warranty.
This is a Delphi 2 ( 4 wire ) sensor.
Black - Signal
Gray - Ground
Purple - Element
White - Element.
Wish me luck on getting the part replaced for free?
This is a Delphi 2 ( 4 wire ) sensor.
Black - Signal
Gray - Ground
Purple - Element
White - Element.
Wish me luck on getting the part replaced for free?
Last edited by FXDWG12; Jun 5, 2013 at 11:05 AM.
Cruiser
Joined: Aug 2010
Posts: 116
Likes: 1
From: South, MS
Just a little update for anyone who cares. The P0051 code is for "low current on the rear O2 heating element". I know that this is only an emissions control issue. But the dash light drives me crazy. Found the sensor make and wiring diagram on the net today. So I ran a continuity meter across the element to varify. The element read "open". So I will be on my way to HD this evening to get a replacement. Gonna try and get them to replace the sensor under warranty.
This is a Delhhi 2 ( 4 wire ) sensor.
Black - Signal
Gray - Ground
Purple - Element
White - Element.
Wish me luck on getting the part replaced for free?
This is a Delhhi 2 ( 4 wire ) sensor.
Black - Signal
Gray - Ground
Purple - Element
White - Element.
Wish me luck on getting the part replaced for free?
Tourer
Joined: Jan 2011
Posts: 356
Likes: 36
From: Oklahoma
Just a little update for anyone who cares. The P0051 code is for "low current on the rear O2 heating element". I know that this is only an emissions control issue. But the dash light drives me crazy. Found the sensor make and wiring diagram on the net today. So I ran a continuity meter across the element to varify. The element read "open". So I will be on my way to HD this evening to get a replacement. Gonna try and get them to replace the sensor under warranty.
This is a Delphi 2 ( 4 wire ) sensor.
Black - Signal
Gray - Ground
Purple - Element
White - Element.
Wish me luck on getting the part replaced for free?
This is a Delphi 2 ( 4 wire ) sensor.
Black - Signal
Gray - Ground
Purple - Element
White - Element.
Wish me luck on getting the part replaced for free?
Something you might try is hooking a volt meter to the PPl and WHT while scoot is running. It'll need to run a couple of minutes to give the sensor a chance to get hot. As it warms up you should see the voltage begin to come up. You should read somewhere around 400mV and it will change a little when you blip the throttle.
I'm not familiar with a low current fault on an O2 sensor. All of them I've been around go to a 10M ohm, voltage loaded, input. You don't flow much current past that with 400mV.
Thread Starter
|
Road Master
Joined: May 2012
Posts: 1,140
Likes: 6
From: Arkansas
you may want too double check your check. On O2 sensor isn't a resistive device. It is a galvanic battery. It creates a small voltage that is read by the ECM. I won't go into the specifics about how it works.
Something you might try is hooking a volt meter to the PPl and WHT while scoot is running. It'll need to run a couple of minutes to give the sensor a chance to get hot. As it warms up you should see the voltage begin to come up. You should read somewhere around 400mV and it will change a little when you blip the throttle.
I'm not familiar with a low current fault on an O2 sensor. All of them I've been around go to a 10M ohm, voltage loaded, input. You don't flow much current past that with 400mV.
Something you might try is hooking a volt meter to the PPl and WHT while scoot is running. It'll need to run a couple of minutes to give the sensor a chance to get hot. As it warms up you should see the voltage begin to come up. You should read somewhere around 400mV and it will change a little when you blip the throttle.
I'm not familiar with a low current fault on an O2 sensor. All of them I've been around go to a 10M ohm, voltage loaded, input. You don't flow much current past that with 400mV.
Thanks again for trying to look after me.
Tourer
Joined: Jan 2011
Posts: 356
Likes: 36
From: Oklahoma
Man. My bad. When you said element I read "sensor element", not heating element.
I don't think I ever tried to figure out what part of the sensor was failed. I wasn't buying. Reading the output will tell you if it's failed in less than a minute. I guess I never waited long enough for the exhaust gas to heat it up.
great deal you got it sorted out.
I don't think I ever tried to figure out what part of the sensor was failed. I wasn't buying. Reading the output will tell you if it's failed in less than a minute. I guess I never waited long enough for the exhaust gas to heat it up.
great deal you got it sorted out.
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Tourer
Joined: Jan 2011
Posts: 356
Likes: 36
From: Oklahoma
One other thing you might check. we used to run them just outside of the head for cylinder tuning (ours are close too). If your EGT gets to 1400 deg. f you are at risk of burning it up. If you are running a little lean and ride it the way I do, this is a possibility.