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Is it normal for the check engine light to come on after changing the battery?
It is entirely possible that the battery was faulty causing low voltage at the computer, which in turn can turn on the check engine light. Most good shops today will test a car’s battery before performing any complicated diagnostic testing.
Does unplugging battery reset check engine light?
Leaving the battery disconnected for about 15 minutes will ensure the vehicle systems will completely reset when you reconnect the battery. Disconnecting the battery will clear the error codes and reset the check engine light.
Can battery issues cause check engine light?
Your check engine light is flashing or won’t go off. When a battery is faulty or undercharged, it won’t be able to send the right amount of energy to your vehicle’s computer. This may cause the check engine light to flip on.
How long does it take for check engine light to set?
Do not disconnected the battery! It will cause all the emission monitors to clear out. Once that happens you’ll need to drive your car through an emissions Drive Cycle (usually takes a few days of driving; around 100 miles or so) to get them to set.
Why did my check engine light come on after replacing battery?
Again, the vehicle started just fine. Third attempt to start the car and the light remained on. Some message boards indicate that a change to a new battery could cause the light to come on while other message boards say battery and check engine light are no where related. Any advice? Rondo.
What should I do if my check engine light turns on after filling up?
If your check engine light turns on after you fill up, make sure the cap is tight and does not tend to be replaced. If it does, this will only set you back around $15, and can affect the timing of how long does it take for the check engine light to come back on after reset.
Is it okay to drive with check engine light on?
If the check engine light is on but steady / solid, it’s okay to keep driving because it’s not an emergency. However, if you keep driving around with a steady check engine light on, your car’s performance may deteriorate without you noticing. In the process, you may suffer expensive fuel mileage.