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Engine Warning Light & ‘Error in Selected Drive Mode’ – Guerrilla 450

Y

yzermania

Getting there...
Location
Austria
Hi everyone,

I recently experienced an odd issue with my Royal Enfield Guerrilla 450 and wanted to check if anyone else here has encountered something similar.

On my last ride, I was going downhill and rode over a cattle grid. Right after that, the engine warning light came on, along with the message “Error in selected drive mode.” (translated from german as seen in the screenshot) Despite the warning, I was able to finish the ride without any noticeable issues.

However, the next day when I started the bike, the error message was gone at first—but reappeared after a short time, and this time the engine performance was clearly reduced. I stopped briefly, restarted the bike, and while the engine warning light stayed on, the performance seemed to return to normal.

I’ve scheduled an appointment with the workshop next week to get it checked out, but I’m curious:
Has anyone else experienced something similar on the Guerrilla 450 or any other Royal Enfield model?

Appreciate any input!

IMG_0753.jpeg
 
When I had my Himi 411 the engine light frequently came on without any clear reason. The first time it happened when I was on holiday in France, one day it rained heavily and the light came on. The bike rode as normal. After a couple of days it went out again by itself.

From then on the light would come on at random times. The dealer looked at it several times and couldn't find anything wrong. Curiously, every time I rode to the dealer with the light on, it wouldn't come on when the mechanic started the bike! It must have been a hypochondriac...

When I advertised it for sale the light was off, and it stayed off as I sold it. Just as well, buyers might be put off by the light being on. I have never heard back from the buyer about this so I presume it is ok now.

I think it is just one of those RE things. Get it checked and if nothing is wrong, try to ignore it.
 
Thanks for the quick reply!


I also don’t think it’s a serious fault, especially since the bike still runs and restarts without any major issues.

The only thing that really threw me off was the sudden drop in performance – that’s what made me a bit uneasy. Hopefully it’s just a sensor glitch or something minor. I’ll post an update after the visit by the RE dealership.

Thanks again!
 
Yes, mine has done this a few times, usually after I’ve had an off road fall. It usually sorts itself out after about 4 to 6 restarts. I haven’t bothered to investigate further as a couple of other 450 owners I know have experienced the same thing and it always sorts itself out.
 
When I drop the bike twice in a short period of time, the engine light goes yellow until I restart the bike twice or three times. No idea why, nor do I know what the error is.

However, sometimes (I want to stress that) when I change toe riding mode to NO ABS, it displays a similar warning message telling my I wasn't possible to change mode and I had to try again after a restart. Again, it isn't always, which is weird.

Do the following: go on a ride, change the mode to ECO and see if the drop on power is similar to what you've experienced. Not that I have a solution, but maybe we can narrow down whatever is going on.
 
Hey folks,


Just wanted to share a quick update for anyone following my earlier post or dealing with something similar on their Guerrilla 450.

I spoke with a Royal Enfield mechanic, and his advice matched what you folks already suggested: disconnect the battery for a few hours to reset the system. I gave it a shot, and sure enough, the error was gone… for a while.

But after some low-speed parking lot practice, the warning came back. What’s weird is that, for a split second, another message appeared before switching back to the usual “Error in selected drive mode.” I couldn’t fully read it, but it seemed to be something about tire pressure.

Now, as far as I know, the Guerrilla 450 doesn’t even have tire pressure sensors. But just to be safe, I checked manually – and both tires were slightly underinflated (about -0.2 bar / -2.9 psi). I adjusted the pressure, restarted the bike a couple of times, and… the warning light disappeared. It hasn’t come back since.

I’ve ridden ~150 km since then, including some twisties and some open roads for higher speeds during my regular commute. Everything feels normal again, and performance is back to what it should be. So maybe the bike really did just “sort itself out,” as you guys mentioned.

Not sure if the tire pressure thing was actually related or just some weird coincidence. Either way, it’s strange – and to be honest I have a hard time to accept that the bike will pop-up strange errors from time to time and hopping it will sort it out somehow.

Anyway, I’ll keep an eye on it. Will update if anything changes again.
 
This sounds very much like my old Himi 411. My dealer went the route of ordering an entire new clock assembly under warranty. Getting that in took a very long time, apparently because in the meantime there was a new assembly compared to my model, and the old ones were out of stock and had to be re-manufactured.... make of that what you will.

I sold the bike months later without ever having received the new clocks. By that time the light had gone off and had stayed off so there was no problem with the sale.

I'd say that you need to push your dealer for a warranty claim. You don't want this issue to be there by the time you need an MOT, or when you want to sell/trade in the bike. You will be the one holding the bag.
 
Yeah, that absolutely makes sense.

I’ve been hesitating a bit to push the RE dealer, since I wasn’t sure if I‘m just being overly cautious with my new bike and this might just be one of those minor, well-known glitches.

But I’ve now decided to take the Guerrilla 450 in next week and have the issue properly checked out. I’d rather get a clear diagnosis than keep guessing what’s going on.

I’ll share an update once I hear back from them!
 
I've had this if you press the right hand mode switch too many times to change from Performance to ECO or vice versa. It's always reset itself by next startup though. Suggest selecting with the two presses a few times - it takes a short time to respond.
 
Hello everyone
I've had the Guerrilla since Tuesday. The first thing I do is fill it with gas. When I finish, I start it, and the check engine light and warning lights come on. The error message in selected mode is also present. The engine has a significant loss of power and is limited to 4,000 rpm, which cuts off the ignition or fuel injection. I return to the dealership, and they remove the message. Everything is fine.
Today, 48 hours later, it started again. It's exactly the same as the first time. This time, it was stopped at a traffic light, not while the engine was starting. When I left home to go to the dealership, the power had returned, but the check engine light was still on. When I got to the dealership, before entering, I started it again, and the check engine light went off. Everything is fine, no help.

I hope RE update the firmware or whatever they need to change; two of these failures in three days is a lot! I have only driven on asphalt and respected (or almost) the engine's running-in limit of 4000 rpm.

Waiting for your news yzermania!!
 
Hi Carlos1392, hi everyone!

Sorry to hear that your new Guerrilla is showing the same error – that really sucks 🙁. Aside from this odd issue, I have to say I’ve actually been very happy with the bike overall. It’s a great bike and a lot of fun to ride.

Unfortunately, I didn’t manage to make it to the dealership this week as planned. I’ll be sure to post an update as soon as I’ve had it checked out.

In the meantime, the best workaround I’ve found is simply restarting the bike a few times. Each time the error appeared, the power cut was gone after the first restart, just the warning light needs some extra reboots (the so-called „it will sort it out“ procedure as stated from other users here as well).

RichardW also mentioned that switching riding modes too quickly might trigger the issue. Personally, I hardly ever change modes—maybe only occasionally in rainy conditions. That said, switching to Eco mode after the warning appears might help as well, though I haven’t tried that yet.

Thanks again to everyone sharing their experiences—I’ll keep you posted!
 
On my bike, the first message that appears is an APS (Acelerator Position Sensor) fault. It's then replaced by the "Error in selected drive mode" message, and the APS error no longer appears.

I've spoken to the workshop and I'm taking it in on Monday. They're going to open the throttle to check it; it's the same place where the drive mode selector is.

I hope this fixes it. I'm sure it will!

The problem is also fixed for me after several starts.
 
I too am having the APS (accelerator/throttle position sensor) trigger. It’s happened a couple times (2 different rides) both at the beginning of a ride on a hot 85-90 degree day. I’ve found that if you restart the bike 4 times it clears on the 4th. The second time it happened however, the code came back immediately after the 4th restart. The 5th restart put the bike back into limp mode about 100yards down the road. I could not get the code to clear and at this point the mode switch would not toggle out of eco mode. I wound up disconnecting the battery for a minute and reconnected which cleared the code. Afterwards I rode for about 8 hours with many stops along the way and no further trouble. After researching the code , I found a video where it’s explained that you let the bike idle for 10 minutes with no input to the throttle the APS (accelerator/throttle position sensor) will reset. I haven’t done the idle thing yet and will probably wait until it happens again. I want to see if disconnecting the battery had any effect. Fun bike but this electrical sensor issue is no bueno.
 
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Hey folks, quick (and slightly frustrating) update:

I went to the dealership this week… only to find out they can’t read fault codes on the new Guerrilla 450s yet. Apparently, they need a new diagnostic tool that they don’t have and don’t know when they’ll get. They promised to call me this week. They didn’t. Shocking, I know - don’t want to comment on that further online 😠

As this was not frustrating enough, the error came back today — along with reduced power. Super fun when you’re trying to accelerate and the bike says “nah.”

At least this time I caught the full message: “Air pressure fault – Visit dealership” (isn’t it ironic, don’t you think)

The mechanic also suggested I stop using E10 fuel. Even though it’s approved, he suspects it might mess with the fuel-air mix. Not sure if that’s legit.

So yeah… no real progress. Either I wait for my dealer to level up their tools, or I travel way out of town to another RE dealership who actually can help.

More to come — assuming the bike lets me get there. 🏍️💨
 
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Hello everyone.
Last week my Guerrilla was at the official workshop all week. I picked it up on Friday. They replaced the right switch cluster with a new one. It's running well, and the "PSA error" error hasn't appeared anymore.
I haven't driven it much; next week I'll use it for my daily commute. We'll see how it performs.
 
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