[30Carbine]

End of May.  Sounds like you are participating in the Central Mountains ATV Association ride.?  Enjoy your ride!

[Chris57]

Greetings. I have a 2019 CForce 800XC with 700km on it. I use 0-40 oil and had no issue with engine start this winter.

On a different note, its been running flawlessly up until yesterday, the engine died with an P0172 error code on the display. When I started it again it would idle but as soon as I hit the throttle is would stop again.

Going to the dealer this week to figure out why.

Anyone else seen this?

[30Carbine]

Not what I wanted to hear.  Just over 430 miles and now does not run.

I have much less time on my 800 XC and have not experienced any codes yet.  So, unfortunately, I have no insight to contribute.

Please keep us posted as to what the dealer finds so we can be aware of the cause if we experience the same error code.

[30Carbine]

Chris57,

Did you get to the bottom of this with your dealer?  It happened to mine this past weekend at 50 miles on the odometer. 

[Jcrom]

Bought a new 2019 800xc about a month ago. Started overheating after 10 miles on trails. Took to dealer, they were unable to recreate the problem  in the shop, so I had to pay for the shop time. Took it to Colorado 2 weeks later, it overheated and wouldn't run due to PO172 code. Took back to dealer for first service and code problem. They said front spark plug was dirty, cleans and reinstalled same plug. Took back next day, wasn't running on front cylinder, changed plug. Yes, I could have done that myself, but they won't know there problems if I fix all of them. Not very happy so far, asked service tech when I get my free "lube" with this machine.

[Z8rider]

overheating - your vehicle likely has a re settable "breaker" type fuse by the small fuse box under the front access. Running change, not all have them. The fuse is too small (10A), dealers are replacing with 15A regular blade type fuse

fault code - there is a ECU re-flash

[30Carbine]

Z8rider is correct regarding the ECU re-flash.

I contacted CFMoto regarding my P0172 error code and the poor running caused by it.  My code has since cleared and the machine is currently running correctly again.  However, CFMoto customer service said, take the machine to any dealer and they can send the ECU to CFMoto under a warranty claim and CFMoto will re-flash the ECU with a programming change that will correct the issue and send it back to the dealer.  I have not had the opportunity to do this yet but I will report back once I have done so to convey if it solved the problem for sure.

[Tittle Diesel Performance]

Just a hint, under the seat is a plug with a cap on it... it’s OBD2 you can use any global OBD scan tool for data and diagnostics. Watch data and see if your getting a TPS signal when you hit the throttle, doesn’t always set a code for it but if it’s staying at 0% that’ll cause your issue.

Codes are a guide line, not a promise that’s what’s wrong. Looking at live data will tell you more about the issue then a code.

[Srkennedy]

Mine had the same proble,. Sent out the ecu, just got it back today.

Took it off the truck and...the code is gone, runs on all cylinders.

However, still has an off idle hesitation that almosy causes it to syall out, and the lights blink off when it hesitates.
200 miles on it, had it 4 months, one of those spent at the dealer, and its going back, until its fixed or they buy it back.

[eg78]

Im having the same issue with 40KM on the ODO... it stalls out often when I give it some gas and sometimes wont start. Where can I check for these codes? Also, I find the machine runs REALLY hot, took it out for about 20 minutes on some trails and it was burning my right leg. Is that normal? what can I do about this?

[Skogsvarelse]

the heat on your right leg is normal. You have the cvt wich produce a loot of heat no mather what you do with it. You can always try to feel if the cvt is blowing air out the cvt exhaust.         

You also maybe have the exhaust on the right side and that are more heat especiually if you have the catalytic converter. I have removed that on mine (500s) and reduced the heat.

[eg78]

Im having the same issue with 40KM on the ODO... it stalls out often when I give it some gas and sometimes wont start. Where can I check for these codes? Also, I find the machine runs REALLY hot, took it out for about 20 minutes on some trails and it was burning my right leg. Is that normal? what can I do about this?

So today I put the the battery charger on and filled the ATV with 94 octane (i suspect the gas that was in there was from the manufacturer maybe 12 months old or so) and kaboom... everything seems to be running great! I'm hoping the problem doesnt re-occur, will update if it does.

[30Carbine]

Regarding the stalling when hot issue, I had the ECU reflashed under CFMOTO's advisement to address this issue and the P0172 error code displayed related to it.  I no longer get the P0172 error when it occurs but I still have the drive ability issue where the bike stalls anywhere between 10% and 40% of the accelerator travel when the machine is good and hot.  If the accelerator is pressed very quickly from idle past the 40% point, the stall can be avoided and the machine takes off like a rocket with no stuttering or misses.  This is not optimal and makes the bike impossible to control well but it will get you home and prevent being stranded miles from nowhere.  The engine temp is fine when this occurs and displays 3 bars on the temp gauge.  It seems to be related to a external hot issue in the engine compartment when the machine has been used on a decent length ride with two riders aboard and driven up and down moderately steep hills.  If the bike is left to cool, the normal driving characteristics return and it accelerates and runs smoothly through the entire accelerator travel again.  I reported this back to my service dealer and am waiting for the next recommendation from CFMOTO.

[eg78]

Regarding the stalling when hot issue, I had the ECU reflashed under CFMOTO's advisement to address this issue and the P0172 error code displayed related to it.  I no longer get the P0172 error when it occurs but I still have the drive ability issue where the bike stalls anywhere between 10% and 40% of the accelerator travel when the machine is good and hot.  If the accelerator is pressed very quickly from idle past the 40% point, the stall can be avoided and the machine takes off like a rocket with no stuttering or misses.  This is not optimal and makes the bike impossible to control well but it will get you home and prevent being stranded miles from nowhere.  The engine temp is fine when this occurs and displays 3 bars on the temp gauge.  It seems to be related to a external hot issue in the engine compartment when the machine has been used on a decent length ride with two riders aboard and driven up and down moderately steep hills.  If the bike is left to cool, the normal driving characteristics return and it accelerates and runs smoothly through the entire accelerator travel again.  I reported this back to my service dealer and am waiting for the next recommendation from CFMOTO.

Well, my machine stopped stalling since I filled it with 94 octane, but now on almost every second time I try to start it it turns and turns and turns but doesnt catch. I have to turn off the power, wait a minute, turn it back on and eventually it'll catch. I brought it to the dealer yesterday waiting to see what they find. No codes.


for the stalling, try filling with 94 octane, it really changed the performance and fixed the stalling issue for me.

[danoduke]

I also have the P0172 code problem on my 800XC.  Left me stranded twice.  It's at the dealer for the second time.  Last time they said it was a loose battery connection...wrong!  Thanks to this forum I'll let them know about the  ECU reflash fix.