Most car manufacturers, as well as BMW, work with an open system, i.e. the independent aftermarket can install a suitable replacement battery without having to reprogram the vehicle electronics.
Do you really need a memory saver when changing car battery?
“They are not effective or worth the risk. I-CAR also teaches not to use them.” Jeff Peevy, I-CAR’s director of field operations, concurred. “A memory saver can complete circuits that removing the battery opens in order to protect the system, and so a memory saver could put systems at risk,” Peevy said.
Disconnecting the battery will not clear any codes in memory of the computer for stored OBD2 codes. The only way to clear the codes is to use a scanner and use the code clear function.
How do I keep car memory when changing battery? – Related Questions
Why is my car acting weird after a new battery?
Even if you have only disconnected the battery for a short amount of time, they can potentially lose the memory that was stored in their VRAM. This also could include the settings for the engine’s idle, which would cause your car to stall.
Which battery terminal do you disconnect to reset computer?
How long do you need to disconnect car battery to reset computer?
You should leave your car’s battery disconnected for a minimum of fifteen minutes and no longer than thirty minutes to reset an ECU. To disconnect a car battery, remove the negative power cable from the negative terminal of your car battery with the use of a socket or monkey wrench. What is this?
How do you erase trouble codes?
How many miles do u have to drive after clearing codes?
In general, you will need to drive between 50-100 miles after you clear your car’s computer. Hopefully, this will get rid of the check engine light once and for all.
Will disconnecting battery cause check engine light?
In conclusion, disconnecting the battery does reset the check engine light. However, it is only a temporary fix and the light will come back on if the problem is not fixed.
In a computer or data transmission system, a reset clears any pending errors or events and brings a system to normal condition or an initial state, usually in a controlled manner.
https://en.wikipedia.org › wiki › Reset_(computing)
Reset (computing) – Wikipedia
your car computer can help out the vehicle by: Allowing you to start your car engine. Getting rid of the check engine light. Fixing any unpredictable engine behavior.
How do I reset my car without a scan tool?
After removing the battery cables, you should proceed to cycle the ignition switch to the ON and OFF position for 3 to 5 times. Press on the horn button in the steering wheel. Keep it pressed for 30 seconds to a full minute to drain out all the stored power in the ECU capacitor. The horn is connected to a hot circuit.
How do I clear my check engine light without a scanner?
How to Reset a Check Engine Light Without a Scanner. To reset a check engine light without a scanner, disconnect the negative battery cable and wait a few moments. This will reset the diagnostic system in your vehicle, and if the underlying issue has indeed been resolved, the light should go off immediately.
What is the most common reason for check engine light?
A faulty oxygen sensor will return a check engine warning every time. In fact, it’s one of the most common reasons why a check engine light comes on while you’re driving your automobile.
The on-off method is the equivalent fix for a vehicle’s check engine light. It forces the computer to refresh its saved state through a reboot. Simply place your key into the ignition and turn it on for 1-2 seconds, then turn it off for 1-2 seconds. Repeat this step three or four times.
Why did my check engine light come on when I changed my battery?
So, why does the check engine light go on after a battery change? The check engine light may go on after battery change because the new battery is faulty, undercharged, or because the sensor is unable to detect the new battery.
How do I reset the memory in my car?
Can a weak battery cause a car to run rough?
Certainly yes! A bad battery can cause a rough idle. This is because a bad battery will not be able to provide enough power to the engine, which will cause it to run slowly and unevenly. If you are experiencing a rough idle, it is important to have your battery checked to see if it needs to be replaced.
How long should a car battery last?
Some cars will get up to five or six years out of their battery, while others will need a new one after only two years. In general, your car will usually need a new battery after three to four years. Replacing your car battery is another part of routine maintenance.