Ebike Motor Position Sensor Fault: Symptoms, Causes & How to Fix

E-Bike Motor Position Sensor Fault

An e-bike motor position sensor fault (commonly Error 08, Error 24, or Hall Sensor Error, depending on your display/system) means the motor controller cannot read the internal Hall effect sensors that detect the rotor's angle.

This can cause the motor to:

• Stutter
• Make a grinding or growling noise
• Shudder under load
• Refuse to spin entirely

Common Causes

1. Loose or damaged main motor quick-disconnect plug — most common, especially near the rear dropouts or chainstay.
2. Moisture or corrosion inside the connector pins or motor casing.
3. Pinched or severed cable where the wire exits the axle.
4. Blown Hall effect sensor(s) on the internal motor PCB due to heat or overcurrent.

Step-by-Step Diagnostic

1. Inspect the Main Motor Quick-Disconnect

Time: 5 minutes

Locate the thick motor cable coming out of the wheel hub or mid-drive motor. Find the quick-disconnect plug along the chainstay.

• Unplug it and check for bent pins, burnt contacts, moisture, or dirt.
• Align the arrows molded onto both connector halves and push them firmly together until the line/notch is completely seated.

Verification: Turn the bike on. If the error clears and the throttle or pedal assist engages smoothly, the issue was a loose or misaligned pin.

2. Inspect the Cable at the Axle Exit

Time: 2 minutes

Examine the cable where it exits the hollow motor axle.

• Look for kinks, cuts, zip-tie crush marks, or damage from a dropped chain.
• Gently flex the cable while applying light throttle, with the drive wheel off the ground.

Verification: If the motor cuts in and out when the wire moves, there is an intermittent internal wire fracture.

3. Test Hall Sensor Signals With a Multimeter

Requires: Basic digital multimeter (DMM)

Reconnect the battery and turn on the system. Access the Hall sensor wires, typically:

• Red: +5V
• Black: Ground
• Yellow / Blue / Green: Signal lines

Measure the voltage between Black and Red. You should see a steady:

4.5V to 5.0V DC

Keep the black probe on Black, then probe each signal wire (Yellow, Green, and Blue) one by one while slowly turning the wheel backward by hand.

Verification: Each signal wire should alternate cleanly between:

0V and approximately 5V

If any wire stays at 0V or 5V, or floats around 2V–3V, that specific Hall sensor is likely faulty.

Solutions Depending on Results

• If a Hall sensor failed: Replace the sensor chip. The standard type is usually a bipolar latching sensor such as SS41 or 41F, or replace the entire internal Hall sensor PCB plate.
• Temporary workaround — Sensorless Mode: Some modern controllers are dual-mode (sensored/sensorless). If yours supports sensorless operation, unplugging the 5-pin Hall harness entirely may allow the motor to run, although you may notice a slight shudder from a dead stop.

What Is an E-Bike Motor Position Sensor (Hall Sensor) and What Does It Do?

An e-bike motor position sensor, commonly called a Hall effect sensor or simply Hall sensor, is a small electronic semiconductor embedded inside a brushless DC (BLDC) motor. It tracks the physical position of the rotating magnets relative to the motor's stationary coils.

Nearly all modern hub and mid-drive e-bikes use 3-phase brushless motors. Because these motors have no mechanical brushes to switch electrical contacts as the wheel spins, the switching must be handled electronically. The Hall sensors make this possible.

How It Works

1. Magnetic Sensing

An e-bike motor typically houses three Hall sensors mounted on or near the stator, spaced at specific electrical intervals, usually 60° or 120° apart.

2. Signal Generation

As the motor rotor spins, its permanent magnets pass over the sensors. Each sensor detects alternating magnetic fields (North and South poles) and translates them into a digital signal:

• High: 5V
• Low: 0V

3. Electronic Commutation

The three sensors output a combined 3-bit binary pattern, giving six distinct states per electrical rotation.

They send these signals back to the e-bike motor controller through dedicated thin wires, typically:

• Yellow, Green, Blue: Signal wires
• Red: +5V power
• Black: Ground

4. Phase Switching

The controller reads the sensor state, determines the rotor's exact orientation, and pulses electrical current through the three heavy phase wires (U, V, W) to pull and push the magnets forward smoothly.

Why E-Bikes Need Hall Sensors

Sensorless motors determine rotor position by reading Back-EMF, the reverse voltage generated by spinning coils.

However, at zero or very low RPM, Back-EMF is zero. This means a sensorless controller cannot determine the rotor position until the bike is already rolling. Hall sensors solve this problem by providing continuous position data even when the motor is completely stationary.

What Happens When a Hall Sensor Fails?

Because Hall sensors operate inside the motor, they are vulnerable to heat buildup, moisture infiltration, or axle-wire pinching.

When one or more Hall sensors fail:

• The motor may stutter, vibrate violently, or make a loud buzzing sound instead of turning smoothly from a stop.
• The display may show a dedicated motor fault code, such as Error 07, Error 08, or "Hall Error," depending on the controller system.
• Dual-mode controllers can bypass the failure by switching into sensorless mode once moving, but takeoff may be rougher and more hesitant.
• Standard sensored-only controllers may shut down power entirely to protect the phase MOSFETs.

What Are the Typical Error Codes for a Motor Position Sensor Fault on Bosch, Bafang, or Rad Power Bikes?

Motor position sensor faults, typically involving Hall effect sensors that track the rotor's position, trigger different codes depending on whether the system uses open-standard controllers or a closed proprietary ecosystem.

Brand-by-Brand Error Codes

Primary Causes and Quick Checks

On hub-motor bikes, such as Rad Power Bikes and many Bafang systems, a motor position sensor error is more frequently caused by an external wiring disconnect than a failed sensor inside the motor.

1. Quick-Disconnect Plug

The multi-pin motor cable connector near the rear axle carries both the three heavy phase wires and the thin Hall sensor signal wires.

If it is backed out even 1–2 mm, the sensor pins may lose contact.

• Disconnect the plug.
• Check for bent or corroded pins.
• Align the molded arrows.
• Press the connector firmly together until fully seated.

2. Axle Exit Pinch

Inspect the cable where it exits the axle nut.

Drops, chain drops, or overly tight zip ties can sever the fine 5V or signal wires internally.

3. Bosch Systems

Errors 500, 510, and 511 usually cannot be resolved by checking external motor connectors because the sensors are internal to the sealed mid-drive unit.

A system power cycle without foot pressure on the pedals is the first step. If the error persists, diagnostic testing with a certified Bosch service tool is required.

Can I Still Ride My E-Bike If It Has a Motor Position Sensor Fault?

Yes, but only with the electrical system completely turned off, using the e-bike as a standard pedal bike. You should not attempt to use the motor assist or throttle until the fault is resolved.

What Happens If You Try to Use the Motor?

• Safety cut-off (most common): Most modern controllers lock out the throttle and pedal assist immediately to protect the electronics.
• Violent shuddering or stalling: If your controller lacks a clean sensorless backup mode, the motor may jerk, groan, hesitate, or refuse to turn under load.
• Sensorless fallback (select systems): Some advanced controllers can fall back to sensorless operation. If yours does, it may feel rough or laggy when starting from a dead stop, but it should still be repaired promptly to avoid heat buildup.

Quick Checks Before Taking It to a Shop

In many cases, a motor position sensor (Hall sensor) error is caused by a loose external connector or water intrusion rather than a failed internal sensor.

1. Power Down and Disconnect the Battery

Ensure no current is running through the system.

2. Inspect the Motor Quick-Disconnect Plug

Locate the main motor cable, typically near the chainstay or axle.

Pull the plug apart and check for:

• Bent pins
• Moisture
• Dirt
• Signs of burning

3. Dry and Clean

If there is moisture or grime, dry the connector thoroughly and use electrical contact cleaner if available.

4. Reseat Firmly

Align the molded alignment arrows on both sides of the connector and press them together until fully seated past the internal rubber O-ring.

5. Verify

Power the display back on. If the error code clears and the motor engages smoothly, the issue was a loose or dirty connection.

If the error persists after checking the connection, an internal Hall sensor may have failed or an internal wire may have severed, requiring motor disassembly or sensor replacement.

How Do I Know If the Sensor Issue Is Just a Loose Cable or a Dead Internal Sensor?

To determine whether the issue is a loose connection or a failed internal sensor, such as a cadence sensor, torque sensor, speed sensor, or motor Hall sensor, work through this diagnostic process from least invasive to most technical.

1. Inspect and Reseat the Quick-Disconnect Plug

Visual and Mechanical Check

Trace the wire from the sensor toward the controller or main wiring harness. Locate the waterproof inline connector, often a color-coded yellow, red, or blue Julet/Higo plug.

• Unplug the connector.
• Check for pushed-back, corroded, or bent pins.
• Check that no moisture is trapped inside.
• Firmly push the connector back together until the alignment arrows align and the plug seats completely.

Verification: Power on the system and test the function, such as rotating the cranks or wheel. If the assist or speedometer readings immediately return consistently, the connector was loose or poorly seated.

2. Perform the Cable Wiggle Test

Check for Intermittent Breaks

With the bike powered on and safely supported, with the wheels off the ground:

1. Activate the trigger condition, such as spinning the pedals or wheel slowly so the assist or speed registers.
2. Gently flex and wiggle the wire along its length, particularly where it enters the frame, bottom bracket, or motor casing.

Verification: If the display reading drops out, cuts in and out, or flickers only when you bend a specific section of wire, the issue is an internal wire break or loose pin, not a dead sensor.

If there is zero response regardless of wiggling, proceed to electrical testing.

3. Test the Sensor Signal With a Multimeter

5V Hall/Sensor Output Test

Most e-bike sensors use a 3-wire Hall-effect setup:

• 5V Power: Typically red
• Ground: Typically black
• Signal: Typically white, blue, or yellow

1. Reconnect the battery and turn the bike on.
2. Set your multimeter to DC Volts (20V range).
3. Carefully back-probe the connector, or test at the breakout pins, between Ground and 5V. You should see a steady 4.5V to 5.0V input from the controller.
4. Move the red probe to the Signal wire while keeping the black probe on Ground. Slowly rotate the wheel, crank, or magnet past the sensor by hand.

Verification: If the multimeter toggles between approximately 0V and 4.5V–5V as the magnets pass, the sensor is alive and transmitting.

If the sensor receives a steady 5V supply but the signal wire remains stuck at 0V or 5V without pulsing during rotation, the internal sensor is dead and must be replaced.

When Repairing an Old E-Bike Is No Longer Worth It

A motor position sensor fault does not automatically mean you need a new e-bike. In many cases, a loose connector, damaged cable, or failed Hall sensor can be repaired. However, if an older bike has repeated motor errors, water-damaged wiring, controller problems, or a motor that is becoming increasingly expensive to repair, replacing the bike may make more financial sense than continuing to invest in individual components.

For riders considering an upgrade, the Himiway D5 2.0 20" is a practical option to look for during an ebike sale, especially if you want a compact fat tire electric bike with plenty of power and everyday versatility.

The D5 2.0 20" combines a 750W motor with 90 Nm of torque, a 48V 15Ah battery, full suspension, and 20 x 4-inch fat tires. Its smaller wheels create a lower, more manageable riding platform, while the fat tires and suspension add stability and comfort on pavement, gravel, rough roads, and recreational trails. It also supports up to 440 lbs of payload, making it suitable for heavier riders, groceries, camping equipment, and other daily cargo.

Another advantage is its flexibility. Riders can switch between torque and cadence sensing depending on whether they prefer more natural pedal response or easier, more relaxed assistance. With up to 70 miles of pedal-assist range and an adjustable assisted speed of up to 28 mph, it works well for commuting, weekend rides, RV travel, errands, and longer recreational trips.

If your current e-bike is reaching the point where motor and electrical repairs are becoming frequent, compare the total repair cost with the price of a newer, more capable bike. Seasonal promotions can make that decision easier, so riders planning ahead for black friday electric bike 2026 deals may want to keep the Himiway D5 2.0 20" on their shortlist.

For buyers who want a compact, powerful, comfortable fat tire electric bike rather than continuing to repair an aging system, the Himiway D5 2.0 20" offers a strong combination of range, stability, carrying capacity, and everyday usability.

How Do I Use a Multimeter to Test E-Bike Hall Sensors?

To test e-bike brushless motor Hall sensors using a digital multimeter, check for DC voltage switching between approximately 0V and 4V–5V as the motor wheel slowly rotates by hand.

Wire Identification

E-bike motor harnesses have three thick phase wires, typically Blue, Green, and Yellow, and a 5- or 6-wire connector for the Hall sensors:

• Red: +5V DC power
• Black: Ground (GND)
• Yellow, Green, Blue: Three individual Hall signal lines
• White, if present: Motor temperature or speed pulse sensor

Step-by-Step Testing Procedure

1. Prepare the Bike and Expose the Connector

Power Off

Turn off the bike's battery and display. Locate the connector between the motor and the motor controller.

Leave the connector plugged in so the controller can supply power to the sensors.

Backprobe setup: Carefully slide a thin needle or paperclip into the back of each wire terminal inside the plastic housing so your multimeter probes have contact points without puncturing the wire insulation.

2. Verify the 5V Supply to the Sensors

DC Voltage Mode

Turn the bike system power ON, with the display on and throttle untouched.

Set your multimeter to DC Volts (20V range).

• Place the black multimeter probe on the Black (GND) wire.
• Place the red probe on the Red (+5V) wire.

Verification: The meter should read steadily between:

4.3V and 5.0V DC

If you read 0V, the controller is not supplying power, or there is a broken power or ground wire in the harness.

3. Test the Yellow Hall Signal

Manual Wheel Rotation

Keep the multimeter's black probe on the Black (GND) wire.

Move the red probe to the Yellow signal wire.

With your free hand, rotate the motor wheel backward slowly. Turning it backward avoids the internal freewheel mechanism on geared hub motors.

Verification: The voltage should toggle back and forth between:

Low: below 0.5V

High: approximately 4.0V–5.0V

The voltage should switch as the internal magnets pass the sensor.

4. Test the Green and Blue Hall Signals

Repeat the same process:

1. Keep the black probe on GND.
2. Move the red probe to the Green signal wire and slowly turn the wheel.
3. Observe the voltage switching.
4. Move the red probe to the Blue signal wire and repeat.

Verification: Both the Green and Blue signal lines should cycle through the same low-to-high voltage pattern:

Below 0.5V to approximately 4.0V–5.0V

Diagnostic Results

• Normal Sensor: Cycles smoothly between below 0.5V and 4.0V–5.0V as the wheel turns.
• Faulty Sensor: Remains at a fixed voltage, such as 0V, 5V, or around 2.5V, without switching. A signal line that does not switch indicates that the corresponding Hall sensor may be faulty or has an open circuit inside the hub.
• All Three Inactive: If all three signals show 0V despite the 5V supply being present, the shared ground wire in the motor cable may be severed.

What Causes a Motor Position Sensor to Fail?

E-bike motors rely primarily on Hall-effect sensors, mounted on a small PCB inside the motor hub or mid-drive casing, to detect the rotor's magnetic poles and synchronize power delivery.

When these sensors fail, common symptoms include motor stuttering or shuddering on takeoff, harsh grinding noises, error codes such as Hall Sensor Error 08 or 24, depending on the display/controller, or complete failure to assist.

The primary causes of motor position sensor failure include:

1. Water Ingress and Moisture Corrosion

Water damage is one of the most common causes of Hall sensor failure.

• Seal Degradation: Axle seals, cable entry grommets, and motor casing O-rings degrade over time due to weather exposure or pressure washing.
• Condensation (Thermal Cycling): Even without direct water submersion, riding in rain or cold conditions followed by parking indoors can draw humid air into the motor casing as the internal air cools.
• Corrosion and Short Circuits: Moisture causes electrolytic corrosion on the sensor legs and PCB traces. Because the sensor operates on low-voltage DC, typically 5V, conductive water or mineral buildup can short the signal lines to ground or 5V power, damaging the sensor.

2. Excessive Heat and Thermal Degradation

Hall sensors are semiconductor chips, typically rated up to 100°C–125°C in standard e-bikes, with some high-temperature versions rated to 150°C.

• High-Load Overheating: Long uphill climbs with heavy loads, running the motor at low RPM under full throttle, or using aftermarket shunts or over-current controllers can push internal motor temperatures beyond safe limits.
• Internal Breakdown: Sustained high temperatures can degrade the semiconductor junction inside the sensor chip, causing intermittent failure when hot. The sensor may work again after cooling until permanent failure occurs.
• Solder Joint Cracking: Extreme thermal cycles cause the solder joints securing the sensor leads to the Hall board to repeatedly expand and contract, resulting in micro-fractures.

3. Mechanical Vibration and Shock

E-bikes experience continuous road vibration, curb impacts, and trail chatter.

• Solder Joint Fatigue: Repeated high-frequency shocks can weaken solder joints at the sensor pins, leading to broken signal continuity.
• Glue/Epoxy Failure: Hall sensors are pressed into stator slots and held with adhesive. Heavy shock can dislodge a sensor from its precise alignment, causing erratic rotor-position readings even if the chip itself still works.
• Axle Wire Shearing: The wiring harness carrying the 5V power, ground, and three signal lines exits through a hollow motor axle. Heavy drops, falls, or spin-outs can twist or pinch these wires against the axle edges, cutting the Hall lines.

4. Electrical Spikes and Voltage Transients

• Back-EMF Spikes: High-current operation, sudden braking, or abrupt controller cutoffs can induce voltage transients through the circuit.
• 5V Bus Failure in the Controller: If the motor controller's internal 5V step-down regulator fails or sends a surge through the sensor supply rail, it can damage all three Hall sensors simultaneously.
• Phase Wire Arcing: If a high-current phase wire melts its insulation inside the motor axle or casing and contacts a thin 5V Hall wire, full battery voltage, such as 36V–52V+, can reach the sensors and destroy them.

How to Confirm a Failed Hall Sensor

You can diagnose sensor health using a digital multimeter:

1. Keep the motor connected to the controller with the battery on, or supply an external 5V source to the Red (+) and Black (-) Hall wires.
2. Probe between Ground (Black) and one Signal Wire (Yellow, Green, or Blue) with the multimeter set to DC voltage.
3. Slowly rotate the wheel backward by hand.
4. Result: A healthy sensor toggles cleanly between approximately 0V and 5V as the magnets pass. If a signal stays at 0V, remains at 5V, or floats around 2V–3V without toggling, that Hall sensor is likely faulty.

Can a Sensorless Controller Bypass a Faulty Motor Position Sensor?

Yes, a sensorless controller, or a dual-mode controller running in sensorless mode, completely bypasses faulty motor position (Hall) sensors.

How It Works

• Sensored controllers rely on the three Hall sensors inside the motor hub to detect rotor position and time the electrical pulses to the phase wires. If a Hall sensor fails, a dedicated sensored controller may show an error, often Error 08, Error 24, or a Hall error, depending on the display, or cause the motor to stutter and lock up.
• Sensorless controllers do not read the Hall sensor signals. Instead, they measure the back-electromotive force (Back-EMF) generated in the three main phase wires as the motor spins to determine rotor position.

Key Trade-Offs to Expect

Practical Options

1. Dual-Mode (Self-Learning) Controller

The most practical swap. Dual-mode controllers use Hall sensors when available for smooth zero-speed starts but can fall back to sensorless operation if a Hall sensor signal drops out.

2. Dedicated Sensorless Controller

Connect only the three thick motor phase wires:

• Green
• Yellow
• Blue

Leave the 5- or 6-pin Hall sensor harness disconnected and insulated.

How Much Does It Cost to Repair or Replace an Internal E-Bike Motor Sensor?

The cost to repair or replace an internal e-bike motor sensor, most commonly a Hall sensor, internal speed sensor, or torque sensor, typically ranges from $150 to $400 for a repair, or $350 to $1,000+ if the entire motor must be replaced.

The exact price depends heavily on whether the motor design is serviceable or sealed.

Cost Breakdown

Key Factors Determining the Price

1. Motor Architecture: Open vs. Sealed Systems

• Bafang / Direct-Drive and Geared Hub Motors: Many third-party bike shops or e-bike specialists can open these motors and replace a failed Hall sensor board or individual Hall IC chips.
• Bosch, Shimano STEPS, Brose, Yamaha: These brands generally treat their drive units as non-serviceable, sealed systems. Most certified shops are technically restricted from opening the casing. If an internal sensor fails outside the warranty period, the standard dealer solution is often a full motor replacement.

2. Sensor Type

• Hall Effect Sensors: Detect rotor position so the motor spins smoothly from a stop without stuttering. Replacement is labor-intensive because the stator must be removed, old chips de-soldered, and new sensors aligned and epoxied or soldered into place.
• Torque Sensors: Often integrated into the bottom bracket or main drive axle. If integrated into a mid-drive core, parts can cost $100–$200 if available, or require a complete drive unit replacement.

3. Sensorless Controller Alternative

If an internal Hall sensor on a hub motor has failed, an alternative is switching to a dual-mode or sensorless motor controller ($50–$120).

A sensorless controller can drive the motor using Back-EMF rather than the internal Hall sensors, bypassing the need to open the motor casing entirely.

Is It Safe to Spray Contact Cleaner Into the Motor Connection Pins to Fix the Error?

Yes, it is safe only if you use a dedicated, fast-drying, residue-free electronic contact cleaner that is explicitly labeled safe on plastics and rubber.

Do not use regular WD-40 Multi-Use, brake cleaner, or penetrating oils, as they can leave oily residues or damage the rubber waterproof seals inside e-bike connectors.

1. Disconnect the Battery and Separate the Connector

Safety prerequisite

Turn off the bike system and remove the battery. Locate the motor quick-disconnect cable, usually along the chainstay or near the bottom bracket, and pull the plug straight apart without twisting.

Verification: Confirm the battery is fully removed from the frame and the connector halves are completely separated.

2. Inspect the Pins and Seals

Visual inspection

Look closely inside both the male and female connector ends using a flashlight.

Check for:

• Green or white corrosion
• Moisture
• Bent pins
• Burn marks
• Damaged rubber O-ring seal

Verification: Confirm that all pins are straight, unbroken, and properly aligned in their channels.

3. Spray With Electronic Contact Cleaner

Cleaning

Hold the can upright and use the straw nozzle to deliver short, targeted bursts directly onto the male pins and into the female pin receptacles to flush out dirt, oxidation, and trapped water.

Verification: Ensure the liquid flushes out cleanly and does not pool with residual grime inside the housing.

4. Allow It to Completely Dry

Time: 5–10 minutes

Leave both connector ends open and elevated in a dry, ventilated space. Contact cleaner evaporates quickly, but trapped solvent inside deep female sockets needs several minutes to fully dissipate.

Verification: Inspect with a flashlight to confirm the pins and socket cavities are visibly dry with no moisture remaining.

5. Align the Arrows and Seat Fully

Reassembly

Line up the alignment arrows or notch indicators on both connector housings. Push the two ends firmly and straight together until the connection lines meet or click into place past the internal waterproof seal.

Reinstall the battery and power on the system.

Verification: Turn on the display to confirm the motor error code clears and the throttle or pedal assist engages normally.

Do I Need to Replace the Entire Motor If a Single Position Sensor Fails?

No, you do not need to replace the entire motor. In most electric bikes, a position sensor, typically a Hall-effect sensor, can be addressed without buying a new motor.

Depending on your motor type and controller, you have three primary paths.

Option 1: Switch to Sensorless Mode

Simplest and Least Invasive

Many modern brushless DC (BLDC) motor controllers are dual-mode. If a Hall sensor fails, these controllers can run the motor using Back-EMF (electromotive force) rather than physical sensors.

• How to check: Disconnect the small multi-pin Hall sensor connector, usually 5 or 6 thin wires (red, black, yellow, green, and blue), while leaving the three thick phase wires connected.
• The result: If the bike runs with normal power, although it may have slight hesitation or shudder from a dead stop, your controller supports sensorless operation.

Option 2: Replace the Sensor or Sensor PCB

Cost-Effective Repair

If your controller requires Hall sensors and shows an error such as Error 08 / E08 and refuses to run, the sensor itself can usually be replaced.

Hub Motors

For Bafang, Shengyi, and generic direct-drive or geared hub motors:

• Most use three standard bipolar Hall sensors, such as Honeywell SS41F or 41F, which cost only a few dollars.
• Open the motor casing, desolder the failed sensor from the small PCB ring, and solder a new one in place with thermal epoxy.
• Alternatively, many manufacturers sell a pre-soldered Hall sensor PCB assembly.

Verification: Test with a basic e-bike motor tester or a multimeter set to DC volts. Measure the signal wire to ground while slowly turning the wheel by hand. The voltage should toggle between approximately:

0V and 5V

When Would You Actually Need a Full Replacement?

A full motor replacement is generally only necessary if:

1. Proprietary, Sealed Mid-Drives: Bosch, Shimano, and Brose rarely sell internal electronic parts directly to consumers, and their internal torque, cadence, or position sensors may be deeply integrated or permanently potted in resin.
2. Internal Collateral Damage: The sensor failure was caused by severe overheating that also melted the phase-wire insulation or damaged the stator windings.