Yamaha R1 Forum: YZF-R1 Forums banner

1 - 20 of 50 Posts

·
Registered
Joined
·
147 Posts
Discussion Starter #1
I get this code every now and the and it is sporadic. The code is for the atmospheric pressure sensor or the air pressure sensor voltage is different. I thought the battery might not be fully charged as I only track this bike and from what I have read the R1 is not battery friendly. Put a new Shorai in an code still is there. Dealer is getting new sensors so maybe one is actually bad. Anyone have thoughts or have had this code.
 

·
Registered
Joined
·
147 Posts
Discussion Starter #3
I replaced the air intake pressure sensor and it seems to be ok know. Keeping my fingers crossed. I am going to have the dealer order another sensor as it is the same sensor as the atmospheric pressure sensor. I also checked for pinched hoses and other things. Hopefully that fixed the problem.
 

·
Premium Member
Joined
·
2 Posts
I have the same problem........replaced the sensors....problem persist. Did anyone ever find a different reason?
 

·
SuperbikeUnlimited.com
Joined
·
2,180 Posts
I got the code 20. I removed the air box and cleaned both censors (intake n throttle housing). Code cleared but came back on.

Checked wire looms n hoses. Seems good. So I ordered two new ones. Hope that resolves it. I will update i a few weeks.

Sent from my 2PYB2 using Tapatalk
 

·
SuperbikeUnlimited.com
Joined
·
2,180 Posts
UPDATE:

I changed the sensor in the airbox. A buddy who is a mechanic told me most sensors that he has replaced are in the airbox only which has fixed the problem. He suggested just try that one first.

So I played the odds he told me. Replaced the airbox one only. Started up, code still showing after warm up. Said the Eff word and turned off bike.

Restarted a few min later, code is gone!! Turned off. Few minutes re started, code still off and remained off for test ride around the block.

I will keep other sensor as a spare. Here is a photo of how they look installed for reference. They have green tags on them which is oem.


Sent from my 2PYB2 using Tapatalk
 

·
Going Gorilla
Joined
·
65 Posts
Hey all. I have recently been dealing with the same issue and was hoping there would be more insight on this issue. I have had an intermittent fault code 20. I've replaced both of the sensors and it still shows the code after a test ride. Unfortunately, this disables the Launch Control capabilities. Does anyone have any other ideas as to what could be causing the code? And does anyone know if there is a way to bypass the code to get Launch Control back online? Thanks!!!
 

·
Registered
Joined
·
368 Posts
My error 19 and 20 experiences have all been with my ignition (rusted contacts from riding in the rain or being parked for a long time in humid weather) or multifunction relay on its way out.

Troubleshoot or replace both if you can.

Sent from my SM-A205F using Tapatalk
 

·
Registered
Joined
·
18 Posts
I've got code 20 as well.

Diagnostic mode is showing 2 kPa delta in pressure between the sensors with the bike not running. Can anyone (who doesn't have engine code posted) tell me how close their atmospheric and intake pressure readings are with the bike not running (Diag codes 02 and 03)? I realize they should be dead on in theory, just wondering how much tolerance these sensors have.

Thanks!
 

·
Registered
Joined
·
18 Posts
*EDIT: I came to the wrong conclusion in this post - real issue turned out to be flaky crimped connection in main harness - see post #30 in this thread for the actual remedy to my intermittent issue and my flow chart for discriminating between sensor, ECU, and harness issues driving engine code 20. *

For those you who have replaced a sensor and are still getting the code, here's what happened in my case and how I was able to fix it:

In diagnostic mode, both sensors (atmospheric and intake) were showing below the real atmospheric pressure (1-3 kPa). I replaced the intake sensor with a brand new one because the intake pressure was farther off from real value than atmospheric sensor. Much to my dismay, the new intake sensor was still showing the same erroneous value in diagnostic mode as the old sensor...

This had me worried that the ECU input circuit was damaged - so just for giggles I swapped the connectors on the sensors to see if the errant value followed the connector (i.e. intake sensor hooked to atmospheric connector and vice versa) - and after swapping the connectors back to being connected to their proper sensors, both pressure values lined up perfectly with the real atmospheric pressure! It has been fine ever since.

My theory is that something about swapping sensor connections triggered the ecu software to re-calibrate itself for the sensors.

Hope this helps if anyone else is baffled about still getting this error code after replacing sensors.
 

·
Beastmode!
Joined
·
36 Posts
Thanks for posting. Quick question, did you hit the on and off switch to on to reset the ECU before switching then back to the original position?
 

·
Registered
Joined
·
18 Posts
I hot-swapped the sensors (left the display in diag 02 / 03 to watch values as I plugged/unplugged sensors).

After the issue was resolved, I tried the old intake sensor on the atmospheric connector just to see if its pressure output would now match the new intake sensor (checking to see if the issue actually had nothing to do with old intake sensor), but it didn't. Closer than before the whole connector swapping process, but still had a 1 kPa delta from the new intake sensor, so I kept the old atmospheric sensor in the bike.

It seems like my case was a combination of marginal intake sensor + ECU needing to re-calibrate to new sensor?
 

·
Beastmode!
Joined
·
36 Posts
Nice!! Thanks again
 

·
Registered
Joined
·
147 Posts
Discussion Starter #15
I replaced both sensors and the code went away when I turned the ignition on. I started the bike let it warm up and the code came back. I traced the wires and found no kinks, loose connections, corrosion, and the ecu plug was tight. The code talked about voltage which got me thinking about the battery, I have a Shorai and since this is a track only bike that is not started everyday I put the charger on the battery for an hour turned the key and no code. Just wondering if a battery that is not fully charged could throw the voltage off.
 

·
Beastmode!
Joined
·
36 Posts
Yes I have the Shorai battery as well and my bike is also track only. I only get the code when my bike gets hot, once I start rolling the code goes away then the engine light stays on. I put the bike in neutral shut it on and off while the bike was still rolling and it goes away. Weird. Gonna change my harness and see what happens...
 

·
Premium Member
Joined
·
242 Posts
For those you who have replaced a sensor and are still getting the code, here's what happened in my case and how I was able to fix it:

In diagnostic mode, both sensors (atmospheric and intake) were showing below the real atmospheric pressure (1-3 kPa). I replaced the intake sensor with a brand new one because the intake pressure was farther off from real value than atmospheric sensor. Much to my dismay, the new intake sensor was still showing the same erroneous value in diagnostic mode as the old sensor...

This had me worried that the ECU input circuit was damaged - so just for giggles I swapped the connectors on the sensors to see if the errant value followed the connector (i.e. intake sensor hooked to atmospheric connector and vice versa) - and after swapping the connectors back to being connected to their proper sensors, both pressure values lined up perfectly with the real atmospheric pressure! It has been fine ever since.

My theory is that something about swapping sensor connections triggered the ecu software to re-calibrate itself for the sensors.

Hope this helps if anyone else is baffled about still getting this error code after replacing sensors.
What model is your bike? Have run into the same problem after installing the dual FTecu qs/autoblip on my -15 r1m. ? All rider aids are locked down, until i can get rid of the error code, and the bike is currently a killing machine without them..
 

·
Premium Member
Joined
·
242 Posts
Update:

Code20 went away by itself for some days, and came backs suddenly.
This time it came when stopping for some fuel. Then i just flipped the ignition key on/off. and the code was gone! ?


Later same day I had a power outage like stated in this tread, were the bike just shut off!
I have no clue if its another problem, or it has something to do with this code20, but I think its worth to mention. (happend twice this summer)

.


Went to do the diag test as nhenry did , and here are mine results :

Diag 02 shows 98 clear dry weather outside [email protected] degrees Celsius inside garage
Diag 03 shows 96 clear dry weather outside measured @15 degrees Celsiusinside garage

So delta 2kpa difference. I have no idea of thats much, but as stated before, shouldt theese two in teory be equal ?

Afterwards I warmed up the bike, and did another Diag test, and they showed the same results as with cold engine.




Orderd multirelay and air pressure sensor to start with.

Here are the Part numbers if someone need :

1WS-82380-00-00 SENSOR, PRESSURE (Yamaha) $90.49
1​
$90.49​
2CR-14451-00-00 ELEMENT, AIRFILTER (Yamaha) $40.78
1​
$40.78​
5VK-81950-30-00 RELAY ASSY (Yamaha) $34.94
1​
$34.94​


I will also try hotswapping the sensors 1st as nhenry suggested



Regarding the power outage I will try a reflash of the bike (Some say it could be a bad ecu block that didnt get flashed ?)
I dont have a Superbikeunlimited flash on mine, since i live in Norway, but it would be really interesting to hear their findings on the problem. :unsure:
Might be that the same problem layes within the standard FlashTune maps. Im running the unrestricted EU 15 R1 map.




If anyone has anything that might help, or found the solution, please post it ! :)
 

·
Beastmode!
Joined
·
36 Posts
Thanks for posting RavenNOR!
 

·
Registered
Joined
·
7 Posts
I faced the same issue with error code 20.... i replaced the 2 air pressure sensors with new one and the error code went off. But, after a day or 2 the error code came back again. Finally i disconnected the short hose from the sensor to the inlet airbox as shown in the attached photo and the error code disappeared for good since a month ago till today ( i did not see the error code display again). As whether it will affect anything other things or the performance of the bike..... NOPE.... it does not.... everything/power is the same as b4. My one cent worth of thought.... Cheers and have a nice weekend
 

Attachments

1 - 20 of 50 Posts
Top