My mazda 3s abs speed sensor is not working, would this cause the motor to stay in 3rd gear? like limp mode almost? When i start my car, there is clicking noise where the PCM is located by the inside passenger floor. Then i when i go into drive it automatically goes into 3rd gear and my dash lights (e.g. park, parking brake,oil,check engine, abs ) flicker and even my front head lights go out. Will replacing the abs speed sensor fix this?
Thank you for your help.!!!

 

Hi, I don't know what model or year your Mazda 3 is, but it sounds to me like you either have a poor terminal contact on you BCM (body control module), or a faulty BCM.
This module is located under the glovebox in the passenger footwell. Your PCM is located under the bonnet next to your battery.
A faulty ABS sensor would not cause the issues you are experiencing.
Hope this helps!

 

Is that passenger side for a UK/AUS car or US/CAN/EUR car?

 

Hi, its passenger side UK/AUS model.

 

My guess is that it is on the other side even on the LHD models, I cant imagine them keeping it on the drivers side with all the other stuff in the way then.