- Vehicles
- Cars
Motor Malfunction Warning Lamp
MG Motor Malfunction Warning Lamp in car: electric drive
Risk level
High
Professional inspection is recommended.
Urgency
Immediate
Quick answer
The Motor Malfunction Warning Lamp on an MG electric car warns of a fault in the electric drive motor or the power electronic box. If it illuminates red (or with a stop prompt), stop as soon as safety permits, power off the vehicle and contact an MG Authorised Repairer immediately.
Safety first
Stop and check this first
- When the red Motor Malfunction Warning Lamp or red Power System Malfunction Indicator illuminates, stop the vehicle as soon as safety permits, power off the vehicle and contact an MG Authorised Repairer immediately.
- The vehicle's high-voltage system uses AC and DC voltages of up to 438 V: never touch high-voltage cables, the power electronic box or the electric drive motor yourself, as only qualified personnel may work on them due to danger of death.
Safe checks you can perform
- If the lamp is red or a stop message appears, pull over and power off
- Read the exact pop-up text in the instrument pack message centre
- Check whether the Driving Power Limited or Power System lamp is lit
Leave these tasks to a qualified professional
- Do not attempt this professional task: Electric drive motor and power electronic box fault code diagnosis
- Do not attempt this professional task: EDS cooling and high-voltage drive unit inspection and repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Electric drive motor and power electronic box fault code diagnosis
What they doThe MG Authorised Repairer connects diagnostic equipment to retrieve fault codes and live parameters from the electric drive transmission motor, power electronic box and power distribution unit (PDU).
They must show youthe diagnostic fault code printout for the electric drive system and power electronic box.
In writingthe stored fault codes, whether the fault lies in the motor, power electronic box or cooling circuit, and the tests carried out.
EDS cooling and high-voltage drive unit inspection and repair
What they doQualified MG high-voltage technicians inspect the EDS cooling system, high-voltage harness and electric drive assembly (operating at up to 438 V AC/DC) and repair or replace the faulty unit.
They must show youthe completed cooling and electrical test results and the instrument pack in READY mode with all motor fault lamps cleared.
In writingany electric drive, power electronic box or cooling parts repaired or replaced and confirmation of a fault-free road test.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
If the lamp is red or a stop message appears, pull over and power off
- Who:
- you, as soon as traffic and road conditions allow you to stop safely.
- How:
- park in a safe place, select P, apply the parking brake, power off the START/STOP switch and do not attempt to keep driving.
- Result that matters:
- following MG's immediate safety instruction for a red Motor Malfunction Warning Lamp or severe drive fault.
- If the lamp is red or the message centre asks you to stop safely:
- keep the car powered off and contact an MG Authorised Repairer immediately.
- If on the MG4 the lamp illuminates yellow without a stop prompt:
- drive gently if required to reach safety and contact an MG Authorised Repairer as soon as possible.
- Evidence to keep:
- a photo of the instrument pack showing whether the Motor Malfunction Warning Lamp is red or yellow.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
Read the exact pop-up text in the instrument pack message centre
- Who:
- you, checking the message centre using the right-hand steering wheel buttons.
- How:
- note the pop-up alert or open the Warning Message view in the message centre to see whether it displays 'Motor Fault, Reverse Gear Not Available', 'Vehicle Control System Fault', or a motor/EDS coolant overheating message.
- Result that matters:
- capturing the exact companion message stored with the warning lamp for the MG workshop.
- If 'DANGER! Evacuate Vehicle Safely' or 'Escape from the vehicle immediately' appears or the battery lamp flashes:
- evacuate all occupants immediately.
- If only the motor or vehicle control fault message is shown:
- remain in a safe place and call MG assistance.
- Evidence to keep:
- a photo of the warning message displayed in the instrument pack message centre.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
Check whether the Driving Power Limited or Power System lamp is lit
- Who:
- you, looking at the instrument cluster without opening the bonnet or touching wiring.
- How:
- check whether the Driving Power Limited Indicator or the yellow/red Power System Malfunction Indicator is illuminated alongside the motor warning lamp.
- Result that matters:
- telling the MG Authorised Repairer whether traction power or reverse gear was restricted when the fault occurred.
- If power was limited or reverse gear was unavailable:
- mention this when booking recovery and diagnosis.
- If no extra indicators were lit:
- report the driving conditions under which the motor lamp came on.
- Evidence to keep:
- a note of the road conditions, speed and any companion lamps active on the instrument pack.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Vehicles
- Brand
- MG
- Product type
- Cars
Known code variants
- Advertencia de fallo de funcionamiento del motor
- Fallo del motor
- MG electric drive motor fault
- MG fallo motor eléctrico
- MG Motor Overheating Warning
- MG power electronic box fault
- Motor Fault, Reverse Gear Not Available
- Motor Malfunction Warning Lamp
- Power System Malfunction Indicator
- Sobrecalentamiento del motor
- Sobrecalentamiento del refrigerante EDS
What it means
In the MG owner's manuals (MG4 Electric and MG5 Electric), the Motor Malfunction Warning Lamp illuminates when the electric drive transmission motor or the power electronic box detects a fault or failure. When the lamp lights red (or the message centre shows 'Motor Fault' or 'Vehicle Control System Fault, Please Stop Safely'), MG instructs you to stop as soon as safety permits, power off the vehicle and contact an MG Authorised Repairer immediately. On the MG4, a yellow Motor Malfunction Warning Lamp means the motor or power electronic box has detected a fault requiring prompt service. The lamp alone does not prove which internal part has failed.
Warnings and stop conditions
- Highsource verified
When the red Motor Malfunction Warning Lamp or red Power System Malfunction Indicator illuminates, stop the vehicle as soon as safety permits, power off the vehicle and contact an MG Authorised Repairer immediately.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
- Highsource verified
The vehicle's high-voltage system uses AC and DC voltages of up to 438 V: never touch high-voltage cables, the power electronic box or the electric drive motor yourself, as only qualified personnel may work on them due to danger of death.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
Symptoms and causes
Probable causes · in order
- Fault or failure in the electric drive transmission motorCommon
Both the MG4 and MG5 owner's manuals state that this warning lamp illuminates when a fault is detected in the electric drive transmission motor.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
- Fault in the power electronic box of the electric drive systemPossible
MG specifies that the same warning lamp turns on if the fault or failure occurs inside the power electronic box that controls the traction motor.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
- Motor overheating or EDS coolant overheating conditionPossible
The MG5 manual also documents a red Motor Overheating warning lamp and message centre alerts for motor overheating or EDS coolant overheating.
Evidence: MG5 Electric Manual del usuario
- Power system fault with limited driving power or reverse gear unavailablePossible
The motor warning may appear alongside the Power System Malfunction Indicator (yellow with limited power or red for severe fault) or 'Motor Fault, Reverse Gear Not Available'.
Evidence: MG4 Electric (MY23) Owner's Manual · MG5 Electric Manual del usuario
Virtual technician
Does Motor Malfunction Warning Lamp still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
MG4 Electric (MY23) Owner's Manual
MG Motor Europe · 2023 · manual
- 2
MG5 Electric Manual del usuario
MG Motor Europe · manual
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