E2 error codes shows on my Pro Form 730 si treadmill

Error code 35 on a Pacemaster Pro Elite treadmill typically indicates a problem with the treadmill's speed sensor. This sensor is responsible for detecting the speed at which the treadmill belt is moving and providing that information to the treadmill's control panel. If the speed sensor is not functioning properly, the treadmill may display error code 35 and stop operating.
There are a few things you can try to troubleshoot and fix this error:

1. Check the connections between the speed sensor and the control panel. Make sure that the connectors are securely plugged in and that there are no visible signs of damage.
2. Clean the speed sensor. The speed sensor may be dirty or covered in debris, which can affect its ability to accurately detect the treadmill's speed. Use a dry cloth to gently wipe away any dirt or debris.
3. Check the treadmill belt for proper tension. If the belt is too loose, it may cause the speed sensor to malfunction. Adjust the belt tension according to the manufacturer's instructions.
4. Replace the speed sensor. If none of the above steps fix the problem, the speed sensor may be faulty and need to be replaced. This is a more complex repair that may require the assistance of a professional.

I hope these suggestions help you resolve the error code 35 issue on your Pacemaster Pro Elite treadmill. If you are unable to fix the problem or if the error persists, it is recommended to contact the manufacturer for further assistance.

Error code E2 on a treadmill typically indicates a problem with the speed sensor. The speed sensor is a small device that measures the speed of the treadmill belt and sends a signal to the treadmill's control panel. If the sensor is not functioning properly, it can cause the treadmill to display an E2 error and prevent the belt from moving.
There are a few potential causes of an E2 error on a treadmill:

1. The speed sensor may be loose or misaligned. Make sure that the sensor is securely attached to the treadmill frame and properly aligned with the magnet on the flywheel.
2. The speed sensor wire may be damaged. Check the wire for any visible damage, such as fraying or cuts.
3. The control panel may be malfunctioning. If the error persists even after checking the sensor and wire, the control panel itself may be the issue. In this case, it may be necessary to have the treadmill serviced by a professional.

I hope this information is helpful. If you continue to experience problems with your treadmill, it is recommended to have it serviced by a professional to ensure that it is functioning safely and correctly.

Ask the manufacturer

Try below:

ERROR CODE
DESCRIPTION
E1
Speed error (The treadmill running speed is 3.2 kph faster than the displayed
speed). The treadmill will stop immediately when the console detects this error.
E2
Speed error (The treadmill running speed is 3.2 kph slower than the displayed
speed). The treadmill will stop 16 seconds later after the console detects this
error.
Troubleshooting / Resetting error codes
In the rare event of the treadmill displaying an error code ("E" followed by a number), simply reset
the computer by:
1. Step off the treadmill. Ensure that you are clear of the running belt.
2. Turn the treadmill off at the master power switch located near the motor housing.
WARNING: Ensure nothing is positioned near or under running belt which may possibly block
it's normal operation.
3. Turn the treadmill on at the master power switch.
4. Ensure that the Safety Tether Key is securely and properly installed onto the console or just
reinstalling the Safety Tether Key can also reset the display.
If the above does not clear the error code, please contact the nearest Dealer/Service Center

LifeGear 97320 Owner Manual Page 17

This conditions indicate belt speed loss. To due any motor, wiring , or motor controller failure.

check this:

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hi,
I have the manual of Pro Form 730si . If you can give your email as a replay for this then i will sent the manual to your email id. I can't upload the manual through fixya. Because its a pdf file.
OK

E21or E2 1 means the treadmill is not picking up a speed signal once the start key is pressed. First, determine if the motor is turning before you get the E2 1 or not. If the motor turns, the speed sensor is the most likely problem. If it does not, you can manually turn the belt with your feet before you get the E2 1 and you should get a speed reading but eventually you will get an error code because it is almost impossible to keep the speed constant enough for the computer. Try running it through calibration with the motor cover removed. their is Tech sheet under the hood and it will explain how to do the calibration

an E2 is a speed error code and the others all just tell me you have a friction problem-elevate the incline up all the way,without mtr working,push yourself off backwards-did you use muscles in arms/lower back? was it diffacult? thats friction,like rubbing hands together for long time. Result, no lube under walking belt- replace mtr,controller,walking belt- cost- a new treadmill

I believe E4 on ths 730si means that the speed of the motor the sensor is detecting is greater than the set speed. E2 would be the opposite. I believe there is a way to calibrate the speed. Look at the smaller motor controller board.

Trimline treadmill starts up then code E2 comes up, and the display shuts down. 
Any ideas???