My engine light came on, took it to autozone for the code. They said it is because O2 sensor is giving a low voltage signal. Now that the engine light is on, my autostart won't work. I tried disconnecting the battery and reseting, autostart works until the engine light comes back one. When I try all the truck does is the horn beeps. It is a 2013 f150 lariat.

Any suggestions?

 

Yeah get the truck diagnosed to find out what's causing the check engine light.
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There are several conditions that will make the remote start not work, and the check engine light being on is one of them. Need to get the O2 sensor diagnosed, and repaired, then once the codes are cleared the remote start system should work.

 

Thanks guys