How to Reset the Check Engine Light on Your Polaris RZR 1000

If you have a check engine light stuck on your Polaris RZR 1000, you're in the right place. We have every solution right here so you can get rid of your idiot light.

www.superatv.com

Didn't know if this would help.

 

Thanks for the link, but it’s kinda the same deal about how it could be so many different things. I’ve taken the frame grounds off and cleaned them and put dielectric grease on them but still the same code. The fuse box is clean and I sealed it with dielectric grease the day I brought it home from the dealership after researching how moisture can corrode the fuses and relays. I just don’t understand why this check engine light is on when everything seems to be working fine, but I guess that’s a good thing. I just feel like It’s hanging over my head and don’t want to get stranded.🤷🏼‍♂️

 

The way I read my shop manual. The 4 is Driver Curcuit Grounded. So I would think it could be a pinched wire or something along those lines.

 

Thanks for identifying the 4 in the code, much appreciated and I agree with you about the wire being pinched or insulation rubbed to the bare wire,but I don’t know where or what this circuit is to inspect it. It seems to me that Polaris should know exactly where and even what wire to check. Rear differential output Driver circuit grounded is what the check engine light refers to. What is the rear differential output and what is the output circuit is the mystery for me. Is it the solenoid for the turf mode or something else, as I said in the first post, the turf mode is working fine and no blown fuses to track the issue.

 

The only thing I can find points to the Turf mode relay.

 

This fault code can be caused by several factors. 1. The wiring harness going to the differential lock solenoid is faulty. 2. The solenoid coil is open. 3. The solenoid coil is shorted. 4. The wiring insulation has worn through, and the wires are shorted to each other or to ground. 5. The chassis relay is faulty, and or the chassis circuit breaker is faulty. 6. The turf mode fuse is blown.

A service manual / wiring diagram is a good thing along with a test light and dvom. Most wiring issues are contact/connection related.

Also found this:

Check Engine Light Code 746 | Polaris General Forum

 

crookedstep & ntrsandman,
Thanks for your input and the list of things to check. I’ve checked several but not all off the list, but the check engine is still on as of now. Went on an all day ride yesterday and no issues other than having to look at the check engine light all day. I still have a few more things to look at so when I get the time to continue troubleshooting and get this figured out I’ll post results.

 

Turf mode cycles on and off properly.
I changed the chassis relay and I changed the turf mode relay. I pulled the fuse/relay box under the driver seat and it looks like it did new. Checked all fuses they checked good. Circuit breaker checks good and the backside of the circuit box looks fine. I reapplied dielectric grease around the seals of the box and all connections. Pulled the ground wires off the frame just below the voltage regulator and cleaned with a wire brush and reinstalled. I still have the check engine light with the same code,
0 746 4? Maybe it’s only something a Polaris dealer can only clear with their proprietary Digital Wrench software? Like I said before, it’s running fine and without issue with the exception that the light won’t go away.

 

Did you ever find the source to 0 746 4? I have the same issue. Just beginning my journey with solving the problem.

 

Check engine light is still on and I’ve put over 600 miles on it without any issues.
I’d rather put a piece of tape over the light than load it up and haul it 60 miles one way, then pay💸 the dealership to turn off a small engine light.
Something that I didn’t think of until recently is it may be possible that the relay that I replaced might be defective, or not exactly OEM. Some relays when activated also send a signal back to the computer telling it that it’s making the circuit, but I doubt this is this case, but it’s a possibility.🤷🏼‍♂️

 

That was going to be my first stab to remedy this problem, replace the chassis relay. It is on order. Beyond that, I may be inclined to take it to the dealership if that doesn't solve it. The vehicle in question, I don't own. My employer does. It will be on his dime. Knowing you haven't had problems driving it 600 miles later, we may also just live with it as well. I haven't notice any problems when switching between drive modes with continued use. I agree for the moment, the light is just plain annoying. I appreciate you chiming back in. I'll post when I know more about it.

 

I appreciate it and if you figure it out post it up here so everyone will know how to remedy this issue, thanks👍🏻

 

Are you 100% sure your turf mode is working? That code normally means the relay and/or solenoid is bad. Since you already did the relay I'd bet on the solenoid but if turf mode is working the solenoid must be working as well.

 

Yes, the drive mode switch is working correctly as the solenoid changes states from positive rear wheel drive and to turf mode single wheel drive and of course also switches to the four wheel drive mode up front. I’ve confirmed it by switching modes in a gravel lot just to be sure. It seems to me that if the circuit was grounded, it would immediately blow the circuit fuse, but it never has. This engine light came on after I switched the fan relay and EPS relay so I could get back to base without overheating the engine because the fan relay went bad and now I have this aggravating light on constantly, lol!

 

I just got our 2017 Polaris Ranger back from the Shop. He found the problem for the code 0746 4 and cleared it. One of the other posters mentioned it earlier, a faulty wire harness. There were 3 to four wires that rubbed bare and were touching each other. They were located under the bed. Wires were re-soldered and wrapped in electrical tape.

 

I will definitely investigate this on my machine the first chance I get and will post my results👍🏻 Where exactly were the wires bare? I see where the wires are taped up in the up close picture, but it’s hard to tell which side of the rear I’m looking at on the machine, driver rear or passenger rear? Thanks so much for the update!

 

The picture was taken from the driver side. When I get back to work on Monday, I'll resend a photo with a wider view.

 

The first image is the overview from the driver side. The second image is where the wiring terminated from the passenger side. the harness ran between the air intake and the clutch housing.

 

Thanks for the pic’s, It gives a really clear starting point.
One other question?
I’m not sure if you can answer this or not, but after the wires were repaired did the check engine light go out on it’s own or did the service person have to clear the code with the Polaris proprietary software? I’ve found mixed information on this issue. Some say that if a fault is repaired the engine fault code goes away immediately, some say that you have to ride it several miles before it goes out and some people say that it has to be cleared by Polaris, even after the issue has been resolved. I’m hoping the light goes out immediately as that would tell me I’ve found the problem, but if it doesn’t clear that means to keep looking. Thanks again for your help on this matter danau.ranau!

 

I don't know how he cleared it.

 

So after trying everything under the sun, I broke down and took my razor to the Steelership to try and get the check engine light code 0 746 4 repaired/resolved. After hauling it 40 miles one way to the nearest Polaris dealer I unloaded it and the service guy pulled it around back to the shop. I went to the waiting room and within 10 minutes they told me it was ready!

I talked to the service tech and he told me that he hooked it up to Polaris’s Digital Wrench and he said it only showed an old low voltage fault even though the 0 746 4 code was still showing on the instrument cluster before he touched it. He cleared the check engine light and I’ve put 100 miles on it since without incident. For 10 minutes on Polaris Digital Wrench the Steelership charged me $70, what a joke, but at least that stupid light is finally off!

“Maybe it’s only something a Polaris dealer can only clear with their proprietary Digital Wrench software?” So true😡

 

Found this solution only after taking it to the dealership. Apparently this is the way around Polaris’s digital wrench program to save yourself the cost of hauling to and from the dealership and the cost for them to clear the check engine light.

Turn the key switch to the off position, unplug the turf mode relay. Now turn on the key switch and plug the turf mode relay back in while the switch is in on position. Check engine light gone, Problem solved, hope this helps someone!