To reset a check engine light yourself, disconnect the car battery, then turn on the headlights for a few minutes to drain the remaining energy and cause a hard reset. Finally, reconnect the battery.Continue Reading
Loosen then remove the wire connected to the negative terminal. Then, remove the wire connected to the positive terminal.
Turn on the headlights, and wait a few minutes until there is no electricity remaining in the system.
First, reconnect and tighten the cable to the positive terminal, then do the same for the negative terminal.
If the problem has been diagnosed and fixed but the check engine light is still on, either use an auto scan tool or simply disconnect and reconnect the battery. If there is still a problem with the engine, disconnecting the battery and resetting the light will not make the light turn off. Also, if the vehicle's radio has an anti-theft setting, disconnecting the battery may make the radio stop working until a specific code is put in to fix it.Full Answer >
The check engine light illuminates on a Mazda to indicate the powertrain control module has detected a problem in the engine or transmission of the vehicle. The powertrain control module is a computer that manages the vehicles fuel injection, firing and emissions, according to Repair Pal.Full Answer >
Critical symptoms of a weak car battery include difficulty in starting the vehicle, a check engine light turning on, a low fluid level, corrosion on the posts and a swollen battery case. Age affects battery performance as well.Full Answer >
The most common signs of a bad car battery include the vehicle backfiring, dimming of headlights while driving, problems with electrical systems in the car and the vehicle not starting. These issues arise at any time. It is important to monitor the lifespan of a battery and ensure that connections are not corroded during that period.Full Answer >