Why does my car not start when I cut the engine?
If it’s cold and you’ve switched the lights, wipers and heater on it may decide that cutting the engine isn’t going to do the battery any favours. This is because all those features will then be drawing electric current from the battery. The computer knows the battery’s most important job is ensuring the engine starts.
Why does my car not start when I move off the curb?
When the system realises the driver wants to move off because they’ve released the brake or dipped the clutch pedal, the ignition starts again. The driver shouldn’t have to do anything to re-start the engine.
When do you Know Your Car is in bad condition?
It’s important to be able to recognise these signs as, depending on the age and condition your car, the engine may sustain damage before the dashboard warning light comes on. High-temperature gauge creeping towards the red – Drive your car for long enough, and you’ll become familiar with where the temperature gauge should sit when everything’s ok.
Why does the computer disable the stop start?
The computer knows the battery’s most important job is ensuring the engine starts. So it disables the stop-start in case the battery is drained so much the engine won’t re-start. Cars with stop-start use special batteries that can withstand constantly starting an engine.
How does the car stop start system work?
The system works with the car’s main computer. It detects when the car is stationary and out of gear (if the car’s a manual) or the brake pedal is pressed (if it’s an automatic). It then tells the car to stop delivering fuel to the cylinders.
Why does stop start not work in reverse?
Stop-start won’t operate when reverse gear is selected or a parking aid is active. Having the wheel turned at an acute angle will prevent it working too. The system realises there’s a high chance you’re manoeuvring and will find the engine cutting out every few seconds more than a little irritating.
Why does the start-stop system do not work?
The reason why the start-stop system does not function can be due to the interaction between both of these essential systems. The top priority for any battery is to start the engine. However, if the battery only has a low charge, the Battery Management System (BMS) switches off the start-stop function to enable the engine to be started.
What does it mean when your car wont start?
It could also be that the battery and alternator are ok, but that you could have what is called voltage drop. This means that the wire between the battery and starter is developing high resistance for some reason, and is not allowing sufficient amps to get to the starter. You could also have a starter problem.
Why does battery management switch off the start-stop system?
The battery management switches off the start-stop function The top priority for any battery is to start the engine. However, if the battery only has a low charge, the Battery Management System (BMS) switches off the start-stop function to enable the engine to be started. A similar protective mechanism operates in the following cases:
Why does my engine start but then stop?
A Bad Camshaft Position Sensor. A bad camshaft position (CMP) sensor can produce different types of symptoms and cause the engine to stall immediately after starting or intermittently. A bad camshaft sensor is likely to trigger the check engine light (CEL).