Why does the MG6 engine not turn off when the key is pulled out?

[DelBrynlee]

The MG6 engine not turning off when the key is pulled out is caused by a loose gear pin in the engine. Reasons why the radio still works after pulling out the key: Modern car electronics are controlled by a bus power system. When you pull out the key, the bus system is still active. It takes about 5 seconds for the bus system to enter sleep mode and stop working. Settings for the MG6 remote key: The beeping sound when locking indicates: doors/windows are not properly closed; or it's the sound of automatic locking. For the MG6 key, the first press unlocks only the driver's door, and the second press unlocks all other doors. This design is for safety reasons. Imagine if all doors unlocked at once - in case of encountering a criminal, they could enter through any door. Unlocking just one door first ensures the driver's safety.

[VonTalia]

I had a similar issue when I was driving my MG6 before, and I was really scared thinking there was a major problem with the car. Later, I found out that the one-button start system of this car is quite intelligent. Even if the key is removed after the engine starts, the car won’t shut off immediately, mainly to prevent accidental operation leading to sudden stops while driving. The mechanical key is just a backup for opening the door, while the smart key module actually controls the engine. However, if the whole car loses power and then regains power while the key is not in the sensing area, the dashboard will light up with a key symbol as a reminder. Last time, I tried placing the smart key 10 meters outside the car, and the car kept running for about half a minute before automatically shutting off. If this situation keeps happening, it might be due to a depleted key battery or a faulty antenna inside the car. The safest option is to go to a 4S shop to read the fault code.

[AubreyDella]

Having repaired several MG6 key malfunctions, most cases where the engine doesn't shut off after removing the key aren't genuine faults. First, confirm if the key you're referring to is the spare mechanical key, which inherently doesn't control the engine shut-off function. If the entire smart key leaves the car and the engine still doesn't shut off, check the dashboard for any 'key not detected' alerts. It could be the start system's delay setting in operation or a signal reception issue with the body control module. Last month, I encountered a case where an aftermarket GPS interfered with the key's frequency, and another where a stuck ignition button caused the system to think the manual shut-off command wasn't triggered. If all else fails, disconnect the car's power for ten minutes to reboot—no need to rush into replacing parts or repairs.

[OMadeline]

The logic behind the MG6's keyless system is quite interesting. The engine start primarily relies on the PEPS system detecting the key fob's chip. When you remove the mechanical part, the main body of the smart key remains inside the car, so the system assumes the driver hasn't left. I've tested the detection range of my own car - even placing the key in the trunk triggers a 'key not detected' warning. The feature allowing the engine to keep running when removing the key is actually very user-friendly, preventing the engine from shutting off during quick stops like buying water. However, if no key is detected beyond the safety delay period, the ECU will automatically cut fuel supply. Remember to regularly clean the detection sensor under the steering wheel, as dust accumulation may cause false readings.

[CalebLee]

Last time I washed the car, I noticed the car was still running after removing the key. My friend said this is normal. The MG6 smart key relies on low-frequency antenna monitoring. Once the engine is started, even if you keep the key in your pocket and move away, the car won't shut off immediately. This design prevents repeated start-stop cycles that could damage the battery when parking. However, if you lock the car and leave, the system will automatically shut down within a minute at most. There's no need to panic if you temporarily get out to move things. But if this happens frequently along with malfunctioning of the ignition button, it might indicate oxidation in the control unit wiring. A check of the BCM module at the 4S shop can pinpoint the issue.

[SanPeyton]

Friends who are into car modifications have talked about this phenomenon. The MG6 not turning off when the key is removed indicates that the engine management system is functioning normally. The smart key system is designed with a two-level detection mechanism. When the physical key is pulled out, the body control module continues to operate until the ECU exceeds the threshold time without receiving a verification signal, at which point it stops the fuel injectors. Some modified vehicles with altered wiring harnesses have experienced signal delays, but factory settings generally include protective mechanisms. It's recommended to check the high-frequency receiver connector on the left side of the trunk—a loose connection can reduce detection sensitivity. For peace of mind, it's best to keep the spare mechanical key separately hung.