Trouble code P1725 means: Rear Wheel Sensor Circuit Malfunction
Trouble code P0171 means:System too lean (Bank 1)
For something as important as a trouble code for an airbag - PLEASE CALL YOUR TOYOTA DEALER AND ASK.
Trouble code P0174 means: Fuel System Too Lean - Bank 2
The engine model serial code for the 1998 Toyota Supra 12092108.
The ECU has detected a problem with the emissions system. Have the ECU scanned with an OBD2 scan tool to retrieve the code that has been set. This code will tell you where to start looking for the problem.
Trouble code P1135 means: Air-Fuel Sensor Heater Circuit Response Malfunction
replace oxygen sensor on the left bank(side towards front of car) it is located on the exhaust manifold staring you in face when hood is open Read more: Toyota Highlander Limited what does trouble code p1150 on - JustAnswer http://www.justanswer.com/toyota/490ow-toyota-highlander-limited-does-trouble-code-p1150.html#ixzz1T8tewlwW
Trouble code P0446 means: Evaporative Emission System Vent Control Circuit
check eng. light code 2716
Most ABS systems have special readers and OBD wont see the codes.
When the computer throws the code that you need to change the sensor.
That code is an evaporative emission control system incorrect purge flow error. It is usually caused by a faulty fuel cap.