Leaving the battery disconnected for about 15 minutes will ensure the vehicle systems will completely reset when you reconnect the battery. Secure the negative cable back to the terminal and cover it with the cap (if applicable). Disconnecting the battery will clear the error codes and reset the check engine light.
How far do you have to drive to reset the check engine light?
To make sure the check engine light does not reappear, it’s recommended that you drive your car 30 to 100 miles. This enables the vehicle’s “Drive Cycle” to reset, as the various sensors need time to recalibrate.
Does disconnecting battery clear error codes?
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 long does it take for a car computer to reset?
The readiness monitors will remain until the car has been driven long enough for the computer to evaluate the various system and sensors. The amount of time can vary based on the vehicle. In some cases it can take up to 100 miles for all of the computer monitors to completely reset.
How many miles do you have to drive after disconnecting battery?
When a car’s battery dies or is disconnected, the computer resets, erasing the internal emission monitors required to pass a smog test. You’ll be good to go once you drive 100 to 200 miles with the new battery.
What battery terminal Do I disconnect to reset computer?
Disconnect the negative battery cable and then the positive cable with a combination wrench. Clean the battery posts and terminals with the post and terminal cleaning tool, so you have a good connection when you’re done.
Will disconnecting battery reset OBD2?
But simply disconnecting the battery will not get rid of OBD2 fault codes. The ECU will still be able to store the trouble codes using power from a capacitor. In order to reset the codes, the built-in capacitor in the ECU will need to be drained of power as well.
Can a check engine light turn itself off?
A check engine light will shut itself off if the condition that caused it is remedied. … If you then did a bunch of highway driving before changing the oil, the specs may have dropped back into the normal range, causing the light to go off.