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In order to recode the radio in your?æ1995 Toyota 4 Runner you will need the old radio code. You can obtain this code by contacting the Toyota company.
What is the radio code for a 1996 Toyota Avalon?
Ignition - Coolant Temperature Sensor
use an OBD-I code reader.
If you have an error code reader use it and the error code. If you don't have it, some car stores can read error codes for you (Auto Zone does). When you know the error code you decide what to do.
OBD1 code reader. Any brand will work well on this system. Very simple system that requires no sophisticated reader.
Under the drivers side of the dash.
http://www.extreme-check-engine-light-codes.com/Toyota%20OBD1%20Decoder.htm
It's a box under your hood labeled diagnostic.
You can either fix whatever problem is causing it, or have it reset with a code reader. If you reset it with a code reader, chances are it will come back on.
The access port is underneath the steering wheel, at the very and of the plastic protection. PS: Camry does not have a code reader, a code reader has to be purchased or you can use AutoZone free service to pull error codes out of the car computer.
Code P0136 is the code set for your O2 Sensor that is located after your Catalytic Converter.