The Tread Index

How to Fix E1 / E2 Error Code on WalkingPad Treadmill

Troubleshooting communication faults, motor abnormalities, and knowing when it's time to replace your foldable treadmill.

Editorial Team
December 8, 2025

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Don't Panic: Decoding the Beeps

If your WalkingPad has suddenly stopped, started beeping, and flashed an cryptic "E01" or "E02" on the LED display, you aren't alone. These are the two most common error codes for KingSmith WalkingPad models (including the A1, C2, P1, and R-series). While they sound terminal, they are often resolved with basic maintenance or a quick check of the hardware connections.

Here is the breakdown of what these codes actually mean and how to troubleshoot them before contacting support.

Error E01: Communication Fault

The Problem: E01 typically indicates a communication failure between the upper controller (the display or signal receiver) and the lower controller (the motherboard driving the motor).

The Cause: On foldable WalkingPads, a data cable runs from the front of the machine through the folding hinge to the rear. Frequent folding and unfolding can sometimes pinch, fray, or loosen this cable.

The Fix:

  1. Power Cycle: Turn off the switch and unplug the machine for 5 minutes. Sometimes this is just a software glitch.
  2. Check the Connection: If you are comfortable using a screwdriver, remove the motor cover at the front of the unit. Ensure the cable bundles plugged into the controller board are seated firmly.
  3. Inspect the Hinge: Look at the folding mechanism. If you see visible damage to the wire passing through the hinge, the cable may need replacement. This is common on older A1 and P1 models that have seen heavy use.

Error E02: Voltage or Motor Abnormality

The Problem: E02 is often known as the "IGBT Burst" or Hall Sensor error. In plain English, the motor is drawing too much current, or the sensor cannot detect the motor's speed properly.

The Cause: The most common culprit is friction. If the walking belt is too dry or too tight, the motor has to work harder than it was designed to. Alternatively, using an extension cord can starve the machine of necessary voltage.

The Fix:

  1. Lubricate Immediately: If you haven't lubricated your deck in the last 3 months, do it now. Lift the belt, apply 10-15ml of 100% silicone oil, and walk for 5 minutes.
  2. Loosen the Belt: A belt that is ratcheted down too tight puts massive strain on the motor. Loosen the rear tension bolts slightly until the belt just barely doesn't slip when you walk.
  3. Ditch the Extension Cord: Plug the WalkingPad directly into a wall outlet. Thin extension cords cause voltage drops that trigger E02 protection.

When is it Time to Replace?

If you have lubricated the belt, checked the cables, and performed a hard reset, but the E1/E2 code persists, you may be looking at a fried controller board or a failed motor. Out-of-warranty repairs for these specific components can often cost nearly as much as a new unit.

If you decide to retire your current machine, you have two paths: stick with the portability of a folder, or upgrade to a dedicated office workhorse that prioritizes durability over folding.

Path 1: The Heavy-Duty Upgrade

If your WalkingPad died from high mileage (4+ hours a day), it likely wasn't built for your workload. Consider switching to a LifeSpan unit. These are the "tanks" of the under-desk world—they don't fold, but their motors are rated for continuous duty cycles that consumer folding treadmills simply cannot match.

Path 2: The Budget Replacement

If you love the folding form factor and just need a quick replacement for light walking (1-2 hours a day), the C2 is the most cost-effective entry point in the current KingSmith lineup. It uses a brushless motor which is generally quieter and more efficient, though it still requires regular lubrication to prevent those E02 errors.

WalkingPad P1
WalkingPad

P1

SCORE: 3.4/5.0
$499
$349

The WalkingPad P1 is an ultra-compact, foldable under-desk treadmill designed strictly for walking in tight spaces, featuring a patented 180-degree folding deck mechanism.

Speed3.75 MPH (6 km/h)
InclineN/A (Fixed Flat)
Motor1.0 HP
Read Full Analysis
WalkingPad X21
WalkingPad

X21

SCORE: 3.9/5.0
$1,199
$799

A premium, double-folding treadmill designed for tight urban spaces, the X21 features a sleek minimalist aesthetic and a unique 180-degree folding mechanism that allows it to store upright against a wall.

Speed7.5 mph (12 km/h)
InclineN/A (0%)
Motor1.25 CHP
Read Full Analysis
LifeSpan Fitness TR1200-GlowUp
LifeSpan Fitness

TR1200-GlowUp

SCORE: 3.6/5.0
$1,499

A premium, heavy-duty under-desk treadmill designed for dedicated office walkers, featuring a high-torque motor and robust weight capacity.

Speed4.0 MPH
InclineN/A (Ergonomically designed flat)
Motor2.25 CHP
Read Full Analysis
WalkingPad C2
WalkingPad

C2

SCORE: 3/5.0
$499
$399

The WalkingPad C2 is a dedicated under-desk treadmill featuring a patented 180-degree folding mechanism, allowing it to store easily under beds or in closets. Designed for walking only, it includes 'FootSense' speed control and a brushless motor for quieter operation.

Speed3.7 mph
InclineN/A
Motor1.0 HP
Read Full Analysis
WalkingPadTreadmill RepairTroubleshootingHome Gym MaintenanceError Codes
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