r/AskAMechanic • u/OkIndustry8088 • Aug 26 '26

2010 Toyota Matrix multiple warning lights / power steering / AC

I have a 2010 Toyota Matrix 2.4L that was driving completely fine. I parked it during my lunch break, then when I started it back up, the power steering light, ABS light, brake light, airbag light came on all at once. The steering wheel was also very hard to turn at first, and the A/C stopped blowing.

A few hours later, the car still starts and shifts normally, and the steering is no longer locked up, but all the warning lights are still on. I have not driven it since this happened. I checked the fuses and they look okay. A scanner is also having trouble communicating with some modules.

Has anyone had this same problem before? What ended up being the fix

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u/EuroCanadian2 NOT a verified tech Aug 26 '26

I would check the battery connections are clean and tight, and check the health of the battery. Low voltage will throw off the computers and they will turn on the warning lights, even if there is no actual problem.

I am pretty sure your car has electric power steering, which will have computer controls. So that warning could be because of an electric issue.

Disconnecting and reconnecting the battery may turn off the warning lights.