Engine check light on - KTM Duke 390 Forum
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post #1 of 21 Old 04-29-2019, 05:08 PM Thread Starter
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So the engine check light has appeared tonight, on my 2019 Duke 390.

The bike has only done 450 miles from new. I recently fitted a lithium battery (Exide, same make as the OE)

Also l have had a Rapid Bike Easy fitted for a couple hundred miles.

I am guessing it’s one of these that’s brought the EML on.

Is there any way to reset it? Or will the light go off when the fault is fixed.

I will try disconnecting the RBE unit, although it’s made the bike much smoother so it will be a shame not to have it.
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post #2 of 21 Old 04-29-2019, 05:47 PM
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Read off the issue code, that'll give you a fuller picture.


After I installed RBEvo on my 2017 Duke, it threw a few CELs, all of them were "mix too rich", from the RBE adding more fuel than normal. After a while, they stopped popping up, so there's that.
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post #3 of 21 Old 04-29-2019, 06:13 PM Thread Starter
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Thank you for the reply.

How do l read the issue code? I assume l need some sort of code reader for that.
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post #4 of 21 Old 04-30-2019, 03:07 AM
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I had a similar issue when I fitted my Rapid bike unit my fault because I'd missed one connection light went off after a few restart cycles .
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post #5 of 21 Old 04-30-2019, 05:14 AM
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Contact the provider/manufacturer of the piggyback, read this issue a couple of times now.
The battery will not be the problem I think.
The OME batteries in my 200 as well as in my 390 were Yuasa batteries.

As long as you are happy with what you ride.
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post #6 of 21 Old 04-30-2019, 07:36 AM
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Quote:
Originally Posted by varroa View Post
Read off the issue code, that'll give you a fuller picture.


After I installed RBEvo on my 2017 Duke, it threw a few CELs, all of them were "mix too rich", from the RBE adding more fuel than normal. After a while, they stopped popping up, so there's that.

Varroa i am experiencing the same issue right now with my 2017 fitted with the Rapid Bike Evo. Check Engine light started showing up about 3 weeks ago it disappeared after a couple of days but now has come back also i am still experience stalling issue when clutching in at stop lights not as bad as before fitting the RB EVO but still happens on occasion. I do not have a scanner to read the code to confirm that they are "mix too rich" codes. Fitted the Rapid Bike EVO around the 800-900 mile mark and now at 1200-1300 mile i started experiencing this check engine light issue. Guess ill just continue to ride the bike to see if it resolves itself since my nearest KTM dealer is about 3 hours away. Can you provide some insight on what you used to pull the code? and if possible how to reset it?

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post #7 of 21 Old 04-30-2019, 11:55 PM
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Not sure about the stalling, there are threads on that issue here. Did you try resetting the engine by 15 minutes of idle?


On the codes, here's something similar to what I bought: https://www.ebay.com/itm/6-Pin-to-OB...S/232895163220


I also use a bluetooth OBD II reader, pretty generic one, and the Torque app.
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post #8 of 21 Old 05-01-2019, 12:46 AM
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I never got any check engine lights when I did my Rapidbike Evo. It shouldn't.

'18 RC390
Delkevic Exhaust
Rapidbike Evo
pedals/levers
fully open airbox
weight removal
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post #9 of 21 Old 05-01-2019, 03:26 AM
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My personal experience of the stalling issue is that itís caused by not pulling the clutch in enough when downshifting. At low rpm, the clutch drag will stall the engine.

I only get this when Iíve not ridden the bike for a while. Once I remember which bike Iím riding then the problem goes away.
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post #10 of 21 Old 05-01-2019, 01:44 PM Thread Starter
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The check engine light has gone off now, l disconnected the RBE and on the third ride after that (two yesterday and one today) the light disappeared.
Sadly this means the bike is no longer so smooth at low RPM.
I’ve emailed the RBE supplier to ask their advice.
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