You need to get the car's diagnostic trouble codes (DTCs) read to determine the precise problem. This can be done in a few ways:
* OBD-II scanner: Purchase a relatively inexpensive OBD-II scanner (available at most auto parts stores). These plug into a port under your dashboard (usually near the steering column) and will retrieve the DTCs. The codes can then be looked up online or in a repair manual to identify the problem.
* Auto parts store: Many auto parts stores will read the codes for free. They can often give you a preliminary diagnosis based on the codes.
* Mechanic: A mechanic will be able to diagnose and repair the problem. This is the most expensive option but ensures a proper fix.
Ignoring the wrench light could lead to further damage or safety hazards. It's best to get it checked as soon as possible.
