Product Error Codes

Error codes 1, 3, and 9 typically are resolved with a controller or motor replacement. In some cases, both of these units need to be replaced. Troubleshooting this error code further requires either a 2nd Murf Bike, or a spare motor and controller. 

READ BELOW OR DOWNLOAD ERROR CODE CHART


If you have a 2nd bike to test with:

  1. Unplug the motor cables from both bikes, and inspect the inoperative bike’s (Bike A) motor cable. Ensure the pins are in good condition and not burnt. Proceed to step 2 if this is the case. Replace the motor and controller if this is not the case
  2. Plug Bike A’s Motor into Bike B’s (a working bike) controller
  3. Test both the throttle and pedal assist on Bike A. NOTE: This will cause the motor on Bike B to spin since they are now connected. If this indeed causes bike B’s motor to spin, then we know that the motor in Bike A is bad and needs to be replaced. If bike B’s motor did not spin while being hooked up to Bike A, then proceed to step 4
  4. Undo these connections to return the bikes to their original configurations (A Controller to A Motor, and B Controller to B Motor)
  5. Attempt this same process in steps 2 and 3, but swap the controllers instead of motors
  6. Once you identify the malfunctioning part, replace it and test ride to ensure the problem is fixed
  7. If the bike still will not function, please contact Sean for further assistance

If you have a spare motor and controller:

  1. Start by replacing the controller first as it is an easier install process.
  2. If this does not fix the issue, connect the original controller and try replacing the motor
  3. If this does not work, try replacing BOTH the motor and controller at the same time.
  4. If this still does not resolve the error code, please contact Sean for further assistance



Error 2:


  1. Locate the throttle on the handlebars and follow the cable down the front of the bike to the wiring harness
  2. Unravel the spiral wrap enough until you can see the connection point into the wiring harness
  3. Unplug the throttle from the wiring harness
  4. Test if the pedal assist feature is functioning properly by pedaling the bike’s cranks and seeing if the motor engages. A bike stand works best for this, but you can also tilt the bike over on its kickstand
  5. If the pedal assist works, then the bike needs a new throttle. Replace accordingly. If the pedal assist does not work, then proceed to step 6
  6. Unscrew the 4 bolts for the controller panel and gently remove the controller
  7. Unplug all connections and replace this controller with a spare one
  8. Test the pedal assist and throttle again. If error code 2 still persists, please contact Sean for further assistance

Error Code 4:

  1. Locate the motor cable coming out of the rear wheel
  2. Ensure it is plugged in securely and completely. The arrows on the cable should align, and the cable should be plugged in completely to line beneath the arrow. Also ensure that all of the pins are straight and not burnt. If the cable was unplugged, plug it back in and test if the error code resolves. If not, proceed to the next step
  3. Replace the controller with a spare one that you know is functioning properly
  4. If this does not fix the issue, connect the original controller and try replacing the motor
  5. If this does not work, try replacing BOTH the motor and controller at the same time.
  6. If this still does not resolve the error code, please contact Sean for further assistance

Error Code 5:

This error code can be triggered in a few different ways and may not require replacement of the sensors themselves. Use the following steps to determine how to resolve this error:


  1. Ensure that you are not holding down the brake handles when you turn the display screen on. This can cause the bike to incorrectly throw this error
  2. Inspect the reach on the brake handles. If the reach is too far out, the sensors will not be able to detect when the brakes are being pressed
    1. The reach screw is located on the inside of the brake handle, and requires a 2mm allen key to adjust
    2. Turn the screw counter-clockwise while keeping an eye on the display screen. Do this on both sides to see if the error code resolves. If not, proceed to step 3
  3. Pick either the left or right side brake to focus on first, then locate the brake sensor cable. Follow this cable down to the connection point on the wiring harness. You may have to unravel some of the spiral wrap to see this
  4. Unplug the brake sensor and see if the error code resolves. If it does, then the brake sensor is bad and needs to be replaced. If the error code does not resolve, then repeat this process on the opposite brake
  5. If the error does not resolve, a new brake handle may need to be installed
  6. If none of these solutions resolve the error code, please contact Sean for further assistance

Error Code 7:

The motor can be stalling and throw this error code for various reasons. For example, holding down the throttle while physically stopping the rear wheel from moving will bring this error up because there is too much physical resistance to overcome for the motor to safely output power. Use the following steps to troubleshoot other causes of this error code:


  1. Replace the controller in the bike and check if the error is resolved
  2. If not resolved, inspect the internal planetary gears of the motor. The gears should be able to move around in the hub relatively easily. 
  3. If one of these gears is chipped or broken, then the gearset may not move effectively, or at all around the hub. In this case, the motor must be replaced
  4. Ensure there is adequate grease within the hub to absorb heat as well as keep the gears moving smoothly
  5. If a motor and/or controller replacement does not resolve the error code, then please contact Sean for further assistance

Error Code 8:

  1. Ensure that the battery is 52v. All Murf bikes made after or within 2020 run on 52v. Models made before 2020 run on 48v
  2. If the bike is 48v, ensure that the charger for it is also 48v. Using a 52v charger on a 48v bike may lead to overcharging the battery cells and this error code
  3. If the bike is 52v, then the issue likely lies within one or more of the cells within the battery
  4. Insert a new battery into the bike and check if the error code resolves
  5. If this does not resolve the error, please contact Sean for further assistance

Bike Will Not Turn On:

A bike that does not turn on at all can have many causes. Fortunately, some of these fixes are simple and can be done in 5 minutes or less. Use the following steps to get the bike back on:


  1. Make sure the key is in the “On” position and the battery is charged
  2. Locate the display screen on the handlebars
  3. Follow the cable out from the screen and down into the wiring harness. You may have to unravel some of the protective spiral wrap. Ensure that the display screen cable is plugged in securely to the wiring harness, and no green color is exposed from the cable
  4. If the cable is connected and the screen will still not turn on, try replacing the screen.
  5. If the bike still will not turn on, check if the fuse for the battery is blown. Depending on the battery, the fuse will be located either on the bottom side panel, or the bottom face panel next to the connection terminals. Identify the fuse type and replace. Test to see if the bike will turn on
  6. If the bike will still not turn on, unscrew the 4 bolts for the controller box. Gently remove the controller and ensure that all connections are secure, especially the (+) and (-) wired connection from the battery terminal
  7. If the bike will still not turn on, please contact Sean for further assistance

Bike is Shutting Off

If your Murf is shutting off while you ride it is important to collect as much information as you can around when and how it happens. Some questions to ask include the following:

  • Does the bike shut off completely (screen completely turns off), or does the screen stay on while the bike becomes unresponsive to pedal assist and throttle?
    • Riders will oftentimes describe their issue as “my bike shuts off completely” when in reality their display screen remains on. This can make a considerable difference on how to approach your diagnosis and potential fixes
  • How long were you riding before this happened?
    • Will our techs be able to reproduce this problem quickly on a test ride, or will they have to ride for 15+ miles?
  • How charged was the battery?
    • When the battery gets down below 15%, the display screen’s “Remaining Battery” estimation becomes less accurate.
    • Additionally, the bike has to work harder when the battery is low and thus will drain faster

If the screen is shutting off completely mid-ride:

  1. Inspect the battery while it is on the bike. Ensure that it sits flush on the battery plate. If it is not flush, then adjust the slide rail and/or bottom plate until it sits flush
  2. Wiggle the battery back and forth a few times. If it is very easy to get the battery to move back and forth, then this indicates that the slide rail/battery track is loose and needs to be tightened. Tighten the slide rail by tightening the 2 screws connecting it to the frame
  3. Test ride the bike to see if the problem is resolved. Normally, a loose slide rail will cause the bike to shut off when you ride over medium-sized bumps, so be sure to take it over a few of these to make sure the problem is resolved. If this does not fix the issue, proceed to step 4
  4. Inspect the bottom of the battery as well as the 2-pronged connection terminal it sits on. Make sure there is no dust, dirt, or burn marks on the connection points. This can cause a short in the battery. Carefully clean any debris from the connection points. If there are significant burn marks on the connections, we advise that you replace them and test ride. If this does not fix the issue, there may be an issue internally with the battery. Please contact Sean for further assistance