How long do you disconnect a car battery to reset computer?

Can I reset my car’s computer by disconnecting the battery?

A. It depends on the car’s age and type of ECU used. On some older cars, disconnecting the battery will reset the system but in most new cars it does nothing, except potentially reset the clock and radio station presets.

How long do you disconnect battery to reset computer?

Almost all sources recommend leaving the battery disconnected for at least 15 minutes to make sure that the code isn’t left behind before you reconnect it because some electrical current remains in the computer for a period of time afterward.

How long does it take to reset car computer?

How Long Does It Take For A Car Computer To Reset Itself? In order for an internal computer in a car to reset, all the sensors need to be checked again after a set period. Around 10 to 20 cycles will occur afterward. It’s like turning on the car at first and then shutting it off again at second.

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Do you have to disconnect both battery terminal to reset computer?

It is recommended to disconnect the battery for at least 15 minutes before reconnecting it to reset the vehicle’s computer.

Does touching the battery cables together to reset computer?

Whenever you touch the battery cables together and drain the capacitors the clock will lose its memory, the radio stations will need to be reset, all fault codes will be cleared, the outside temperature may take some time to relearn, any systems with security codes will need to be reset and the computer will need to …

Will disconnecting battery clear trouble codes?

If you leave the battery disconnected for about 15 minutes, the vehicle systems will be completely reset when the battery is reconnected. It will clear the error codes and reset the check engine light if the battery is disconnected.

What happens if you disconnect the positive terminal first?

It’s important to disconnect the negative side of the battery first, otherwise you can cause an electrical short if the positive is removed first.

How do I reset my car after replacing the battery?

Answer provided by

  1. Detach the battery cable for two to three minutes.
  2. Reconnect the battery and start the car.
  3. Drive the car for at least 10 miles to let the engine control units find any potential problems.

How much does it cost to reset a car computer?

The pricing for this can vary depending on the amount of work to fix it and the parts needed. Generally, this can be between $80 and $180. If you GPS continues to steer you of course and you end up stranded in a dark, creepy forest, it might be worth investing in a roadside assistance membership.

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Should I disconnect battery if car parked long term?

If you don’t have access to an outlet – say, in a long-term airport parking lot – your second option is to disconnect the battery. That’ll preserve the battery’s charge, so when you reconnect it, the truck should start right up.